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De-Lucking Team Offenses

If you are similar to me, then you spend more than a trivial amount of time on the teams leaderboard page. I find myself sorting the wRC+ column for my daily Ottoneu, The Game, and game preview needs. But, like a suspicious man at a bus stop, BABIP lurks just a few columns away. It haunts my well-crafted insults hurtled brazenly towards the Miami Marlins from the comfortable solitude of my home office.

I have spent the past year or two studying BABIP, in part because it has shown the power to unlock a fielding independent hitting metric I so cleverly and regrettably titled ShH or Should Hit. But other than confusing friends during spoken conversation, Should Hit can also regress offensive production based on four simple factors: walks, strikeouts, home runs, and BABIP.

We have previously employed ShH and its stepchild, the De-Lucker X (DLX), to regress players according to their previous performances. But now, let us throw whole teams into the De-Lucker vat. It will be great opportunity to kick the already over-kicked Marlins — as well as offer uncommon accolades for the San Francisco Giants and San Diego Padres lineups.

One of the historical problems of the DLX has been that massive, hairy catchall, BABIP. Its only role in ShH is to cancel itself out, essentially. That’s why DLX uses xBABIP instead of BABIP. But xBABIPs, especially ones based on batted-ball data, are unreliable. My preference has long been to use career BABIPs instead of xBABIPs, but BABIP talent changes over a career (ask Ichiro Suzuki).

We need to make two major assumptions: (1) ballparks affect BABIP and (2) teams will maintain certain BABIP patterns over periods lasting multiple years.

The first assumption is easy, but still a forgettable concept. We know Coors Field increases homerun rates, but tend to forget it also has higher single and double rates too. Likewise, it easy to forget how Tropicana Field, with the second-largest foul territory in the league, suppresses singles and doubles.

Consider the BABIPs of teams home and away over the preceding three seasons:

2010-13 Home and Away BABIPs

With this graphic here, I think we are seeing multiple effects on BABIP. With Home BABIP, we are seeing mostly park effects. With the blue Away BABIP, we are seeing organizational preferences, as well as a little bit of divisional park factors.

For instance, the Seattle Mariners have low BABIPs both at home and on the road. This may be a component of playing a large amount of away games in Anaheim and Oakland, but they also play in Arlington, where BABIP is encouraged. I think we can attribute at least a good portion of that low away BABIP on their decisions to funnel significant playing to Justin Smoak (career .262 BABIP), Brendan Ryan (.283 BABIP), and Dustin Ackley (.285 BABIP). The Mariners have shown a lower threshold of acceptable BABIP levels than, say, the Brewers or Marlins.

Maybe the Mariners’ particularly BABIP lull is due to a Mariners-strength streak of terrible luck. But the Cubs — who also assembled some rough offenses during that period — clearly had an organizational predisposition towards high BABIPs. And though the franchise is in new hands, many of those same types of players remain from the previous regime.

If we solder these two major assumptions together with the DLX, we can create two fun regressed numbers — defined for the purposes of the coming visualization:

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Some takeaways: