What is wRC+?

As you may have noticed, there’s now an extra column in the “Advanced” section for batting stats called “wRC+”. You can think of this stat as a wOBA based version of OPS+. It’s park and league adjusted and it’s on a very similar scale as OPS+. The difference is that it uses wRC, which is based on wOBA.

For those of you not familiar with the scale, 100 is average. Anything higher is above average and anything below 100 is below average.

Big thanks goes out to Tangotiger for pointing out how easy it was to implement this particular stat. It’s now available in all the player pages for major league and minor league players going all the way back to 1871. Please note that it is not park adjusted for minor league stats, but it is league adjusted.

It’s also in the career leaderboards and will soon be making its way into the individual season leaderboards too.

Update: I’ve removed pitchers from the league baselines, so the values will have changed slightly since this morning.



Print This Post



David Appelman is the creator of FanGraphs.


Sort by:   newest | oldest | most voted
brent in Korea
Guest
brent in Korea
6 years 7 months ago

Thanks for the new shiny toy!

Bradley Woodrum
Member
Member
6 years 7 months ago

Yeah, thanks!

Sabermetrics I can understand, but how this site works is beyond me! I’m assuming Fangraphs is assembled and maintained using only the finest of black magic HTML coding and ancient, runic Javascripts.

Thanks again, David and Dave and all the others who keep the hamsters running!

Andrew Kneeland
Guest
6 years 7 months ago

Thanks, guys!

Ivan Grushenko
Guest
Ivan Grushenko
6 years 7 months ago

Is it park-adjusted? I thought wOBA was not.

Poseidon's Fist
Guest
6 years 7 months ago

wOBA, wRC, and wRAA are not park adjusted. Batting RAR and now wRC+ are.

JoeR43
Member
JoeR43
6 years 7 months ago

So now we don’t have to raid baseball-reference or baseball prospectus when we need a park-adjusted number to tell Brian Giles haters to swallow crap.

HOORAY.

Tim
Guest
6 years 7 months ago

Awesome!

Just want to get some things clear.

Todd Helton had a 137 wRC+ last year.

Does that factor Coors in?

Is Todd Helton = 137 in neutral park?
or
Is Todd Helton = 137 in Coors + road game parks?

Tim
Guest
6 years 7 months ago

Okay, figured that one out myself. Read me… read.

Todd Helton = .391 wOBA which translates into 137 wRC+
Kyle Blanks = .372 wOBA which translates into 141 wRC+

Blanks was better offensively with neutral settings than Helton.

The thing I don’t understand is the rate of translation.

Blanks when he is .372 wOBA = 141 wRC+
but in the projections Bill James has him at .364 wOBA, and only has that amounting to 124 wRC+. If that were the case, the average wOBA would have to be somewhere in the .354 wOBA range, which isn’t even close (I think it’s .330 wOBA).

Any accounting for this discrepancy?

Tim
Guest
6 years 7 months ago

If you were to normalize each player to neutral conditions, it really wouldn’t matter where a player ended up, or who ends up where. We’d know their baseline, and we could figure out essentially which division they play in, which park etc, and we’d have a better idea.

I definitely have noticed this with wOBA’s as the projections seem to already be park based. Helton with a wOBA .391 and Iannetta at .369. A-Gonz at only .383.

Tangotiger
Editor
Member
6 years 7 months ago

Right, of course the forecasts themselves can’t be park-adjusted. How would we verify the forecasts if they were?

The question being asked is: giving these playing conditions, given this team, given his competition on the team, given the chance that he will be traded by the deadline, given everything, how many HR will he hit? And, then at the end of the season, you compare your forecast to what actually happened.

Tim
Guest
6 years 7 months ago

Figured as much. My mistake with that assumption. I’m looking for numbers that don’t exist (park and league neutral projected players stats). The only one that would keep those kinds of things handy are actual GM’s.

Brian Cartwright
Guest
Brian Cartwright
6 years 7 months ago

Yes, Oliver is park and league neutral. They are nearly ready. Last year I only had batting, but this year will also include pitching, defense and probably baserunning. Depends on how fast I can code sql.

wOBA itself is not ‘park-adjusted’ because it’s just a system of weighting the different offensive categories. With Oliver, I simply park and league adjust the numbers before calculating wOBA.

Joser
Member
Joser
6 years 7 months ago

I must’ve missed this: if wRAA is park-adjusted, what are the adjustments? Is there a table of park effects somewhere?

philosofool
Member
Member
philosofool
6 years 7 months ago

NICE!

The big surprise for me is that Mickey Mantle is number four all time.

Mark Runsvold
Guest
Mark Runsvold
6 years 7 months ago

I always thought Mantle was poorly served by existing offensive metrics. Glad to see him way up there where he belongs.

neuter_your_dogma
Guest
neuter_your_dogma
6 years 7 months ago

Yeah, but he is still slower than the Babe using SPD.

Poseidon's Fist
Guest
6 years 7 months ago

OPS and OPS+ each are rate stats. Even though wRC is a counting stat, I assume wRC+ is a rate stat as well?

Michael
Member
6 years 7 months ago

Since you are dividing over a league average (at the given number of PA), it becomes a rate stat.

For example, Dan Uggla had 668 PA last year. wRC was 94.5 runs (after park adjustment). League average at that number of PA (based on wRC – wRAA from the Advanced section) was 80 runs. (94.5 / 80) * 100 = 118 wRC+. It’s a measure of “percentage better than league average,: and as such is written out as a rate.

Poseidon's Fist
Guest
6 years 7 months ago

It first blush, it seems like wOBA+ might be the more appropriate name, but I suppose arrive at “wOBA+,” one would convert to wRC and then follow the same steps through to wRC+. Six or one half dozen

RockiesMagicNumber
Guest
6 years 7 months ago

While this makes sense, I guess I don’t see why we don’t just do a wOBA+ similar to statcorner.

I just rambled all my thoughts over at Purple Row, and still haven’t reached a consensus.

http://www.purplerow.com/2009/12/14/1199724/monday-rockpile-baseball-america#27119713

Seriously though, my biggest confusion is the application of wRC+. Can you effectively use it for more than just saying “Well this is what Julio Lugo did with the PA he was given relative to a league average bat in the same number of PA”?

B
Guest
B
6 years 7 months ago

Can you elaborate on the league adjustment a little more? Does it differentiate between AL and NL? If so, how?

Andy S
Guest
Andy S
6 years 7 months ago

Which method do you guys use for park adjustments?

DME
Guest
6 years 7 months ago

I’m very glad to see this added, but it wasn’t tangotiger who pointed out how easy it was to do or that you should add this stat. I’ve sent at least 10 emails over the past 2 years regarding this. Thank you for finally taking notice, even if of someone else.

lookatthosetwins
Guest
lookatthosetwins
6 years 7 months ago

You should give yourself a pat on the back.

JD Sussman
Member
6 years 7 months ago

DME, I’m glad you send those e-mails because his metric looks great. But how would you know what Tango did or didn’t do?

vivaelpujols
Guest
6 years 7 months ago

Tango brought up RC+ in a blog post a couple of days ago. I don’t recall him having mentioned it before.

If DME really sent David several emails showing how easily he could have done this and was ignored for two years, than he has a right to be somewhat indignant. Although, knowing David, I doubt that this was exactly the case.

Anyway, I’ve never really got hooked on OPS+, but a lot of people seem to like it, so kudos for doing this David.

Tangotiger
Editor
Member
6 years 7 months ago

“it wasn’t tangotiger who pointed out how easy it was to do or that you should add this stat”

I obviously did say it. No need to say that I didn’t say something that I’m on record as saying I said!

If he meant he was the FIRST to do it, that’s fine. I don’t really track who said what when. It’s not an insightful suggestion by any means.

For the record, I don’t normally track when I say things, but I do know that I posted on Sean’s blog to get RC+ up there about two years ago.

And I talked about Linear Weights Ratio relative to league average at least as far back as 2003 when I wrote this article:
http://tangotiger.net/banner.html

Anyway, enough with who said what first on such an uncreative concept.

DME
Guest
DME
6 years 7 months ago

slight exaggeration, maybe, but multiple emails were sent…

DME
Guest
DME
6 years 7 months ago

And I do not wish to say I make my prev. statement in spite or anger or brag or anything. I am very glad to see the addition. My sense of humor is poor. I love the site (hell, I quote it perhaps too much, along with THT) and only wish the best upon ya.

Apologies.

but seriously…xFIP+!

Andy S
Guest
Andy S
6 years 7 months ago

Also, thanks.

Terminator X
Guest
Terminator X
6 years 7 months ago

So I got all excited about this being park/league adjusted, and went to go comparing NL and AL players only to realize I had no clue how to convert this to runs. Is there a remotely easy way to do that?

Or rather, convert it to R/PA to keep it as a rate stat?

Terminator X
Guest
Terminator X
6 years 7 months ago

Just had a “duh” fore-head slap moment – all I’m looking for is park/league adjusted wRC and/or wOBA. If I’m correct, these things are not currently park/league adjusted.

Sej
Guest
Sej
6 years 7 months ago

David mentioned that the “Batting” column of the Value section is park adjusted wRAA if that helps you. I don’t think it’s league adjusted and you’d have to add in average runs created to get back to a zero based counting stat. I suppose you could add in the applicable league average runs but I don’t have any background in these statistics so I don’t know if that adjust the numbers like you want.

Darkstar
Member
Darkstar
6 years 7 months ago

Thanks a ton for the new toy! Simplistic stats like this often become a true blessing.

Does lead one to ask though; tRA+ or FIP+ in the works? :)

Dan
Guest
Dan
6 years 7 months ago

Could you swap wRC+ and wOBA on the stat page so wOBA is the last one farthest on the right? My brain is programmed to see wOBA on the far right and I’m sure I’ll adjust in time but it is a little annoying right now!

A Different Dan
Guest
A Different Dan
6 years 7 months ago

I had exactly the same thought/thought problem.

BATTLETANK
Member
BATTLETANK
6 years 7 months ago

Check out Dick Allen. is he the only guy in the top 25 not to be in the HoF. unjust!

JoeR43
Member
JoeR43
6 years 7 months ago

To be fair, his career was short and he was a bad defender, but his WARP-3 on baseball-prospectus is still higher than Orlando Cepeda, Tony Perez, and soon to be Hall of Famer Andre Dawson.

ThundaPC
Guest
ThundaPC
6 years 7 months ago

Sweet deal!

Any chance the definition of wRC+ (and tRA for that matter) can be added to the Quick Glossary?

Tangotiger
Editor
Member
6 years 7 months ago

FIP+ would be very easy, since that’s FIP/lgERA.

I am COMPLETELY opposed to the way b-r.com does it (lgERA / ERA). It’s beyond the silly to put the thing you are comparing against in the numerator, all because you want to make it “bigger is better”. I have a whole thread dedicated to this if someone is interested.

The only suggestion I have seen that makes any sense is:
2 – ERA/lgERA
And then multiply by 100. This way, if you have a 4.00 lgERA and your ERA is 3.00, then your ERA+ (or FIP+) is 125. And if you have a 5.00 ERA, then your ERA+ is 75. Notice the symmetry and the bigger-is-better.

The way b-r.com does it, you end up with 133 and 80, even though together the two pitchers would be average.

Andy
Guest
Andy
6 years 6 months ago

Any idea when this will make it to the individual season leaderboards?

TD
Guest
TD
6 years 5 months ago

BA

HR

RBI

OBP …OK. Whatever.

But after this, I rather just watch the games.

Seels
Guest
Seels
6 years 5 months ago

Ok, then do that. Why are you at Fangraphs if all you care about are triple crown stats?

wpDiscuz