Coming home with Jackie

I did something out of the ordinary early last year. Having never written a single piece of baseball research, I yet found myself prodded to action by the page dedicated to Jackie Robinson at Retrosheet. I studied his steals of home, put the numbers through some sabermetric paces, and produced this.

And am I ever glad I did. I offered it to Dave Studeman here at The Hardball Times, and he snapped it up. It got a pretty good reception from readers, nudging me to try my hand at the game again, and again. It wasn’t long before I was a regular fixture here.

Obviously, I have a soft spot for my original Robinson article. More, something I wrote near the end has stayed with me, a promise left pending, unredeemed. I said that once fuller statistics were in for Robinson’s career, somebody, perhaps I, should examine the following proposition:

Hypothesis: Jackie Robinson accumulated more run-producing, game-winning value with his steals of home than with all his other career steal attempts put together.

When I wrote that, numbers for neither Expected Runs nor Win Expectancy/Win Percentage Added yet existed for the early part of Robinson’s career, but there was good reason to hope they would be compiled soon. I composed the original article around Expected Runs, but so far my source for those numbers has not extended them back to 1947.

Baseball-Reference did recently extend its play-by-play records, including WE and WPA, back to the 1947 season. Not all 1947 games had full PBP at the start, but all 1947 Brooklyn Dodgers games did. I suspect we have Allan Roth, the statistician hand-picked by Branch Rickey in 1947 to work with the Dodgers, to thank for that specific completeness. He personally scored every Dodgers game in that era, and his records survive.

Here was the chance to keep my promise. More, I could do it with a superior metric, counting the wins Robinson created with his steals rather than runs. That’s what I’m writing about today. Those who don’t remember the original piece are invited to go back and read it over now, but if you still recall the main points or just want to dive in here, go right ahead.

The untangling

I began my cataloguing of Robinson’s steals, thinking my path to an answer was clear. Before long, I started hitting the potholes on that road, all due to the problematic definition of a “play.”

Example: Robinson is sent running from first on a two-strike count. The batter strikes out, swinging or looking, as Robinson steals the base. Baseball-Reference counts both changes to the base-out state as one occurrence, assigning it a single WPA value. By this measure, Robinson appears to have cost his team win probability by stealing second.

Or perhaps he’s caught stealing, in which case the negative values for both the strikeout and the caught stealing are hung around his neck. In both cases, two values are amalgamated, and it is not possible to tease one out from the other, not from B-R’s records.

There are several other ways this happens. Robinson steals home, but a trailing runner is put out trying to take home behind him. Robinson steals home, but an attempt to nab a trailing runner at third produces an error and scores that second run. Robinson steals second, but two errors allow him to come all the way home. (All of these scenarios happened during Robinson’s career.)

I had two tasks. First, I needed to decide how to handle multi-element plays. Second, I had to find a way to measure the proper WPA for the elements of those plays that I was counting for Robinson.

The first task wasn’t that hard. Some applied common sense, plus a judgment call here and there, gave me this list of rules:

1. Errors on a play count in Robinson’s favor, unless they were made on attempts to put out other runners. If the catcher chucks the ball into center field, Robinson’s play forced that error, and he deserves credit for the extra base he takes. If said catcher chucks the ball into left field trying to cut down Gene Hermanski at third while Robinson steals home, Robinson is not credited for Hermanski coming home. (In that real-life play, the error went to the third baseman, apparently frozen by all the action.)

Likewise, if Robinson was put out on continuing action, that counts against him. Example: On July 9, 1950, he stole second against the Phillies, advanced to third on catcher Andy Seminick‘s error, then was thrown out trying to take home. I count it all, and the total result is just as though he had been out at second. In the same vein, outs made on other runners going for an added base aren’t debited to Robinson.

2. All gains on a multiple steal are credited to the lead runner. If Robinson’s heading home on a triple steal, the bases his teammates gain count for him. If he’s on first for a double-steal of second and third, it’s a null event for Robinson.

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This isn’t a perfect rule, as sometimes it can make sense to try to put out the trailing runner. Yet consider this: Jackie at first and Player X at second pull a double-steal. Who would Player X have to be for you as the catcher to throw to second? And how many plausible Player X’s played for Robinson’s Dodgers? In this context, the rule works pretty well.

3. Robinson is not liable for the batter striking out on a busted hit-and-run, but is liable for his own advancement or failure to advance. I could not exclude these plays without hunting down every other missed hit-and-run not resulting in a strikeout and excluding them too.

I will, however, track the two attempted steals of home, both failed, that came on busted plays: a hit-and-run on July 26, 1947 and a suicide squeeze on May 13, 1956. Going for home on such a play is materially different from going for second base. I’ll do the calculations according to the above rule, but when appropriate I’ll note how Robinson’s numbers would look if not charged for those two times he was truly hung out to dry.

4. By a similar token to rule 3, Robinson is responsible for his success on delayed double-steals. I filtered them out at one point in my original article to make a big point on success rates, but I cannot exclude them here. Taking the result at a discount would require me to invent an arbitrary percentage, and I can’t see how that’s any better than just counting it fully.

Figuring out the WPA of those separated plays was trickier. Baseball-Reference’s data no longer helped. I went elsewhere for the numbers—that elsewhere being here.

The Hardball Times website hosts the Win Probability Inquirer. This lovely gadget lets you calculate a team’s Win Expectancy in nearly any situation you can dream up, as well as figuring the Win Probability Added going from one situation to another. This is perfect for my purposes: I can include and exclude whatever elements I need to.

The Inquirer also thankfully factors in run environments. I calculated expected runs per game for the Dodgers, by year and park, and ran the scenarios accordingly. As I mentioned in my original article, Robinson’s Dodgers were a high-scoring team, both through their offensive punch and the hitter-friendly characteristics of Ebbets Field. This is broadly reflected in the numbers, retarding gains and amplifying losses compared to our modern run environment.

(I did have one hitch here. The WPI allows runs per game values in half-run increments from 3.0 to 6.5. However, the 1951 Dodgers were expected to produce 6.8 runs per game in Forbes Field, Pittsburgh, which rounds to a 7.0! Robinson did make two attempts in that environment, swiping second both times. I did a little extrapolating from 6.0 and 6.5 values to get something that satisfied me. The effect only registered at the fourth decimal place, but I mention it for thoroughness. Oh, and the Dodgers actually over-performed expectations, scoring 94 runs in 11 games at Forbes that season. Helps when you’re batting against the ’51 Pirates’ pitchers.)

I set aside Baseball-Reference’s WPA numbers and went entirely with THT’s Win Probability Inquirer. Having numbers from two sources would confound the data, whatever work it might save me.

First pass

The stolen base and caught-stealing numbers come from the game-by-game records at Baseball-Reference. Allan Roth’s records, compiled at Retrosheet’s tribute page to Robinson, credit him with one fewer stolen base in 1947. B-R’s game accounts show that added stolen base (whichever it is), and I calculated its WPA value, so I am counting it.

When I ran the numbers, I came up with these results. The following table is for regular-season play. I will cover his performances in the World Series at the end of the article.

Year   SB  CS  SBH  CSH    WPA     WPA-2    WPA-3    WPA-H
1947   28  11   3    1   +0.5676  +0.2380  +0.1547  +0.1749
1948   22  14   5    3   +0.1353  -0.1741  +0.0074  +0.3020
1949   37  16   5    2   +0.1900  -0.0534  +0.0888  +0.1546
1950   12   5   1    1   +0.0436  +0.0125  -0.0115  +0.0426
1951   25   8   1    1   +0.1094  +0.1713  +0.0276  -0.0895
1952   24   7   1    0   +0.3294  +0.2387  +0.0125  +0.0782
1953   17   4   0    1   +0.1053  +0.0432  +0.0675  -0.0054
1954    7   3   1    1   +0.1489  +0.0274  +0.0604  +0.0611
1955   12   3   1    1   +0.0658  +0.0145  +0.0505  +0.0008
1956   12   5   1    1   +0.1282  -0.0440  +0.1117  +0.0605

Total 197  76  19   12   +1.8235  +0.4741  +0.5696  +0.7798

I have some notes of interest before grappling with conclusions. First, there was often value in Robinson’s stolen-base plays aside from the bases he stole. On 197 successful steals, 26 times he advanced at least one extra base on an error the defense made trying to catch him. That comes to 13.2 percent. The authors of The Book estimated that base stealers get an extra base eight percent of the time, inching up to nine percent for the fastest and most disruptive runners. Jackie’s outlying success might be due to inferior steal defense in his day—or maybe he was just that fast and disruptive.

In three of the instances, he made home on a steal of third, and 21 times, he made third after stealing second. And twice, he came all the way home from first base on the steal. How disruptive an opposing team would consider this, one can only imagine.

This aggression didn’t come without cost. Twice Robinson was put out on continuing action after a steal (not counting the World Series—the story on that one is coming later). One of those was the Andy Seminick play in July of 1950 that I noted above in my Four Simple Rules. Still, a 26/2 ratio produced plenty of value. You’d break even or better stealing third with two outs at that rate—even if the disruption you caused was to your manager’s heart rhythm.

If you’re wondering about a breakdown of steal attempts by base: Robinson was 150-54 stealing second, 28-10 going for third, and 19-12 coming home. Percentages are 73.5, 73.7, and 61.3, respectively. Second and third was all the same to Robinson, apparently.

Steals of home would rise if you factored out busted plays like hit-and-runs or suicide squeezes, as I mentioned in my original article. If you do that, though, you need to do likewise for busted plays on other steals. Robinson was 13-10 on busted hit-and-runs that resulted in a strikeout (or in one case a walk when he was going for third). Subtract those from his steals of second and third, and the combined percentage nudges up from 73.6 percent to 75.3 percent. No surprise that Robinson was better when you left him alone to figure out when to go.

Now for the WPA numbers. Robinson’s career is seemingly defined by stealing other teams blind. (Okay, we know what it really is defined by, but I meant in the games themselves.) Despite that, the value he produced with stealing is not overwhelming. Some of the reasons I touched upon in the original article: percentages not that far above break-even, a concept nobody really grasped back then, and not tailoring his aggression to game situations, which was understood better but not exactly a science either.

This falls in with the caution modern analysts have raised about the running game. Even a successful base thief won’t add a mountain of value, unless with extremely high success rates. Robinson didn’t have those, though he did have the opportunism to turn one stolen base into two or three. And stealing home could be very rewarding at seemingly low rates.

Just not quite as rewarding as I had thought. Robinson produced more WPA value stealing home than either second or third, but my hypothesis involved beating the number for second and third combined. He missed that by about a quarter-win: +1.0437 for second and third, +0.7798 for home. My speculation last year was incorrect.

However … steal attempts are not the only way that base-thieving aggressiveness can register with Win Probability Added. Let’s go one level deeper.

Three outcomes (maybe less true than those others)

A runner looking to swipe the next base risks more than being called out 90 feet away. He also risks getting picked off. Robinson encountered this occupational hazard of the base-stealer 23 times during his career. (This counts pure pickoffs, not the pickoff-caught stealing, which is counted with regular steals.) Given his lifetime 197-76 record on steals, this is a substantial number. Add those pickoffs to his caught-stealing numbers, and suddenly his success rate drops from 73 percent to below two-thirds. You can do this with any player, not just Robinson, but his example is illustrative.

Robinson’s nemesis on pickoffs was Boston Braves pitcher Warren Spahn. The southpaw picked off Robinson four times over the years, including twice in the first game of a Sept. 6, 1948 double-header in Boston. Quite attention-getting is when those pickoffs happened: the 11th and 14th innings. Yes, Spahn started the game, and was still pitching in the 14th. Jackie’s aggressiveness was costly: The Braves won in the bottom of the 14th. For a single season, the Giants’ Clint Hartung was the champ, picking Jackie off three times in 1949, but never before or afterward.

From 18 pickoffs at first base and five at second, Robinson lost a total of 1.0432 WPA. He was never recorded as being picked off third. Count this against his other stealing numbers, and Robinson tumbles to just break-even stealing second and third, with his positive stealing-home numbers untouched. I could claim vindication here, but there are positives yet to count.

Pickoffs don’t always go right, or even neutrally. A wild throw can give the runner the base he was hoping to swipe, or more. This was a tougher hunt, as pickoff errors are too uncommon to get their own specific search function. I looked up pitchers’ throwing errors on the teams Robinson faced, checked fielding logs to see if those pitchers made errors playing the Dodgers, and looked over play-by-play on matching games. Doing this, I was able to find 10 instances where Jackie Robinson took at least one extra base on a pitcher’s pickoff error, plus one in the 1952 World Series.

(I did omit searching for pickoff errors by catchers. There would have been a great deal more work for an event that occurs much less often, perhaps never where Robinson was concerned.)

Robinson really made hay when a pickoff went awry. Six of the 10 times, he took two extra bases on the error, including going second to home via Milwaukee Brave Ernie Johnson’s miscue on Sept. 11, 1956. He got a bit of revenge against Hartung by going first-to-third on him in a 1949 game, though Warren Spahn never slipped that way.

This restores some of the WPA lost to pickoffs, but not nearly all. In total, it’s a 0.2756 WPA gain, just over a quarter what he gave away. There were no errant pickoffs when he was on third, so all of the gain goes into the second-third column.

And again, we’re not quite done. One final way a nervous pitcher can reward a potential base-stealer is with a balk. I counted eight times in the regular season, and twice in the World Series, that Robinson advanced on a balk. However, I only count five of the eight (plus the two Series events) in Robinson’s favor. On the other three, the base ahead of Robinson was occupied: it wasn’t the threat of Robinson (alone) running that triggered the balk.

Robinson accumulated 0.0617 WPA via the five balks: two when he was on first, two on second, and one on third. On that last one, Jackie basically stole home without even having to run. As it was in an 8-1 game in the ninth inning, though, the WPA value is a tiny 0.0003. Almost all of his balk value is in non-home situations.

So let’s look at the chart again. Non-steal events are counted with the base ahead that Robinson was potentially stealing. If he’s picked off first, that counts with attempts to steal second; if he’s balked home, that counts with attempted steals of home.

Events          No.   WPA Ttl.   2nd      3rd    2nd+3rd    Home
Steal attempts  273   +1.8235  +0.4741  +0.5696  +1.0437  +0.7798

Pickoffs         23   -1.0432  -0.8241  -0.2191  -1.0432      0
Pickoff errors   10   +0.2756  +0.1412  +0.1344  +0.2756      0
Balks             5   +0.0617  +0.0189  +0.0425  +0.0614  +0.0003
All non-steals   38   -0.7059  -0.6640  -0.0422  -0.7062  +0.0003
Total           311   +1.1176  -0.1899  +0.5274  +0.3375  +0.7801

The steals of home finally do come out ahead, after a fair amount of manipulation. I can’t consider this a true vindication of my starting hypothesis, but it’s an informative result.

This does assume, though, that all the value of those ancillary plays should be counted toward Robinson’s penchant for stealing. That’s not quite so: We can record what a pitcher did, but not whether a runner really was planning to take the next base or just wanted a good lead. But even if only half the value of those plays was attributed to Robinson’s stealing, it would still nudge his plays for home above those for the other bases combined.

The numbers do emphasize something a bit unexpected, that one could already see in the steal-only table: Robinson was doing some real damage stealing third base. He produced greater value on 38 attempts at third than the did on 204 attempts at second. He did this despite making a fair number of attempts with zero or two outs, the latter especially considered a violation of the proverbial Book and a tactical blunder. As my original article noted, Robinson didn’t restrict himself to ideal tactical situations or great leverage:He went when he thought he could take the base.

The secret to his success at third is probably that he had company. In at least nine of his 38 attempts to steal third, the man on first was running with him. (It may be as many as 12: Robinson was caught three times for the third out in potential double-steal situations—twice on strikeout-throw out plays—and what the trailing runner did is not recorded. Accounts in The New York Times mention none of the plays.)

The double-steal of second and third is one of the great untapped percentage plays in baseball. Going with one out, the break-even percentage is just a little over 50 percent, and it’s not too much worse with zero outs. Robinson was seven for nine for the times we know he was leading such a double-steal, and all but one came with one out.

The cumulative WPA on those nine plays is +.3339, over half his value for all attempted steals of third. Even if all three unsure plays are debited to double-steals, it still comes out to +.2242. Averaging as much as 3.8 percent of a win for a single play is great percentage baseball.

When it really counted

Now for the World Series. Robinson’s stealing record in World Series play is superficially perfect: six for six on steals, plus advancing twice on balks and once on a wild pickoff throw. There are two complicating factors, though. The list here is short enough that I can show you every steal-related play Robinson made in the Fall classic. All games listed were against the New York Yankees.

Date     Game  H/A  Inn. Base/Out Bkn-NYY Took/Play    WPA
9/30/47   One   A    T1   1XX/1     0-0    2nd/SB    +.0156
9/30/47   One   A    T3   1XX/2     1-0    2nd/Bk    +.0101
10/2/47  Three  H    B1   1XX/1     0-0    2nd/SB+O  -.0405
10/1/52   One   H    B6   1XX/2     3-1    2nd/POE1  +.0073
10/3/52  Three  A    T9   12X/1     3-2    2nd/DS       0
10/5/52  Five   A    T2   12X/0     0-0    3rd/SB    +.0362  
10/2/53  Three  H    B5   X2X/1     0-1    3rd/Bk    +.0318
10/5/53   Six   A    T6   X2X/1     0-3    3rd/SB    +.0169
9/28/55   One   A    T8   XX3/2     4-6   Home/SB    +.0527

For the completists—which is probably a pretty good number of you—the balks were charged to Spec Shea and Vic Raschi respectively, and the pickoff error was by Allie Reynolds.

The sore thumb in that list comes in Game Three of the 1947 Series. Robinson stole second, then started for third when catcher Sherm Lollar‘s throw got past Phil Rizzuto.

Second baseman Snuffy Stirnweiss backed up the heave, though, and got the ball to Rizzuto, who tagged Robinson out as he was scrambling back to second. Not one for Robinson’s highlight reel; not even a play most Yankees die-hards would remember, unless Scooter recounted it a time or nine in his broadcast days.

The other obvious oddity is Game Three in 1952. As the back end of a double-steal, Robinson’s stolen base gets no credit in my system.

There’s some irony that Robinson’s two biggest base-stealing plays in the World Series didn’t really affect the outcomes of the games. Brooklyn survived his off-base encounter with Rizzuto by winning a 9-8 slugfest. His fabled steal of home in Game One of the 1955 Series closed his team’s gap to 6-5, but that was the final score of the game.

Taking just the steals, Robinson is credited with -.0249 WPA for stealing second, +.0531 for third, and +.0527 for the fabled steal of home against Yogi Berra in 1955. Add these to career steals, and … no, not quite. Steals of home end up a total +0.8525 WPA, against +1.0723 for the rest. I can’t drag my hypothesis across the finish line that way. All told, World Series steals produced +.0809 WPA for Robinson.

Throwing in the balks and pickoff error, the value for second in the Series rises to -.0075, and for third to +.0849; the overall Series number goes to +.1301. It’s the reverse of the regular season numbers: For the Series, home comes out ahead on steals alone, but falls behind when ancillary plays are included. With so small a sample, there’s no actual meaning to that, except for what he did on the basepaths and to the nerves of opposing pitchers. And to the temper of Yogi.


I was wrong: Jackie Robinson did not accumulate more value with steals of home than with all his other steals. A broad look at the record, though, shows that his stealing success came through everything but the standard, mundane steal of second base. He piled up value not only going for home, but by stealing third, often leading double-steals, and with frequent extra bases taken by provoking errors and balks.

His greatest successes came with two of the most untapped percentage plays in baseball: the steal of home, and the double-steal of third and second. These require quite modest success rates to produce win value, and Robinson easily beat those break-evens in a way he had more trouble doing with the workaday steal of second.

Perhaps this is the foundation of Robinson’s reputation as a singularly disruptive base-runner. It wasn’t that he might steal on you, but that he might steal anything on you, at any time. Second, third, or home; double-steal or triple-steal; first inning or ninth; six runs up or six runs down. If Robinson had a base open ahead of him—and sometimes when he didn’t—you could not relax.

Those opposing pitchers did not relax, a truth visible in the pickoff numbers, as well as the pickoff error numbers. You could best him, like Warren Spahn did, but you could never ignore him, not even at the end of his career. In proof of that, I note that Robinson converted the last nine stolen base attempts he ever made.

Let that stand as a fitting conclusion to my twin studies of Jackie Robinson: from his first game to his last, you could never ignore him.

References & Resources
I have updated my original table of Robinson’s attempted steals of home plate, to reflect not only the WPA data but new information about pitch counts. There was no natural place for it in the article itself, so it goes here. WPA values are figured in accordance with the rules I listed above.

Date	     Opp't  Inn. Score Base/Out	Count  SB?    WPA  The Final
6/24/47	     @PIT    T5	  2-2	X23/1	 2-1	Y   +.0107  W 4-2
7/19/47	     vSLN    B1	  1-2	1X3/2	 2-1	Y   +.0795  L 7-5
7/26/47	     @PIT    T6	  3-0	1X3/1	 1-2	N   -.0279  W 6-4
8/29/47	     vNYN    B6	  5-1	XX3/2	 0-0	Y   +.0216  W 6-3
7/4/48	     vNYN    B7	  4-8	X23/2	 0-0    Y   +.0278  W 13-12	
7/21/48 (1)  @CHN    T9   9-3   XX3/2    1-1    N   -.0003  W 9-3
7/23/48	     @PIT    T5	  3-0	XX3/2	 1-1	N   -.024   W 4-3
7/25/48 (1)  @PIT    T8	  6-5	X23/2	 2-0	Y   +.1032  W 7-6
8/4/48	     vCHN    B1	  1-0	XX3/2	 0-1	Y   +.0664  W 5-4
8/22/48	     vBSN    B5	  2-2	123/2	 0-1	Y   +.1156  L 4-3
9/3/48 (2)   vNYN    B1	  0-0	1X3/2	 1-2	N   -.0485  L 6-3
9/28/48	     vBSN    B5	  6-4	XX3/2	 0-0	Y   +.0618  W 9-8 (13)
5/17/49	     @CHN    T8	  2-0	XX3/2	 0-0	N   -.0268  W 8-5 (11)
6/2/49	     vSLN    B6	  3-1	XX3/2	 2-0	Y   +.0591  L 7-4 (14)
7/16/49	     vCIN    B2	  0-1	123/1	 0-1	Y   +.0788  L 7-6 (10)
7/18/49	     vCHN    B6	  1-0	XX3/1	 1-1	Y   +.0379  W 3-0
8/9/49	     @PHN    T5	  5-0	1X3/2	 0-0	Y   +.0253  W 8-1
8/14/49	     vBSN    B5	  3-1	1X3/2	 1-0	N   -.038   W 7-2
9/20/49	     @CHC    T8	  4-0	XX3/2	 1-1	Y   +.0183  W 5-0
6/19/50	     vNYN    B6	  8-4	XX3/2	 2-1	N   -.0124  W 8-5 (11)
7/2/50 (1)   @PHN    T4	  1-4	XX3/2	 2-1	Y   +.055   L 6-4
5/2/51	     vPIT    B2	  0-1	1X3/2	 3-1	N   -.0896  L 4-3
9/26/51	     @BSN    T8	  13-3	1X3/1	 ?-?	Y   +.0001  W 15-5
5/18/52	     vCHC    B4	  2-1	123/2	 3-1	Y   +.0782  W 7-2
7/16/53	     vSLN    B7	  7-2	XX3/2	 0-1	N   -.0054  W 9-2
4/23/54	     @PIT    T6	  2-1	123/2	 2-0	Y   +.1015  W 6-5 (13)
6/17/54	     vMIL    B2	  0-1	XX3/2	 0-1	N   -.0404  L 6-4
8/28/55	     vSLN    B2	  0-0	XX3/2	 3-1	N   -.0391  W 6-1
8/29/55	     vSLN    B6	  4-1	123/2	 3-1	Y   +.0399  W 10-4
9/28/55	     @NYA    T8	  4-6	XX3/2	 1-0	Y   +.0527  L 6-5
4/25/56	     @NYN    T2	  0-0	XX3/2	 1-0	Y   +.0822  W 7-2
5/13/56	     vNYN    B8	  6-4	123/1 	 1-1	N   -.0217  W 6-4

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A writer for The Hardball Times, Shane has been writing about baseball and science fiction since 1997. His stories have been translated into French, Russian and Japanese, and he was nominated for the 2002 Hugo Award.
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Paul Moehringer
Paul Moehringer
I think whenever you have a player that’s become a demigod like Robinson, its almost impossible to judge them fairly in terms of how great of a player they were. For most players this usually work in their favor, but for Robinson I’m not so sure that it doesn’t work against him in some respects. His legacy of breaking down the color barrier casts such a large shadow, its very difficult to actually appreciate him as a player.  And he wasn’t just a great player, he was maybe the best player in all of baseball from 1948-1953. That part of… Read more »
David P Stokes
David P Stokes
Robinson started his MLB career at age 28.  Given his talent, it’s reasonable to assume that he would have gotten an earlier start if not for the color barrier.  In his case, however, there was more than the color barrier standing between him and the big leagues. First, he was a college graduate in an era when most players started their pro career straight out of high school.  Of course, even as talented as was, he probably wouldn’t have gone straight to the majors if he hadn’t gone to college, but it’s not unreasonable to think he might have been… Read more »
This (and the preceding piece) is really very impressive research.  Good work. I suspect that the value of Robinson’s SBAs at 2nd base may be shortchanged here, by not accounting for attempted steals on which the batter put the ball in play.  As best I can tell, you aren’t able to account for these plays (please correct me if I’m wrong).  And they will have a net positive value: extra bases gained on hits, plus GDPs avoided on ground outs, will outweigh the occasional extra DP on line outs to IFs.  I’d be surprised if accounting for this doesn’t yield… Read more »
Marc Schneider
Marc Schneider
While it’s not quantifiable, there is also the question of how good Robinson would have been had he not had the pressure of being the first black player?  The stress, especially in the early years when he had to simply accept the abuse, was enormous and I would think it had to affect his performance some.  In the latter years of his career, Robinson put on weight and, ultimately, developed diabetes, which shortened his life.  It does not seem completely unreasonable to attribute some of that to the stress (maybe leading to poor eating habits)that he endured while breaking in.… Read more »
Cliff Blau
Cliff Blau

If Robinson had been white, he wouldn’t have been discharged from the service in 1944, and probably wouldn’t have started in AAA in 1946.  And he might not have played baseball at all, since it wasn’t his best sport.

Terrific article.