I’ve begun to add wOBA (Weighted On Base Average) and Lefty/Righty splits to the site. Currently, they are only available on the player’s page in the Batting Graph. L/R splits are available from 1952 until the current season.
I should mention that my wOBA calculations DO NOT include SB/CS data. This was done on purpose to be able to compare L/R to the overall value. The BaseRuns / 27 Outs DOES include SB/CS data. For the most part, the wOBA and R/27 percentile should be very similar, except for the top base stealers (see Carl Crawford). Also, just like all the other stats, the wOBA percentile ranking IS park adjusted.
There are 3 bars in the wOBA section. The bar on the left is vs LHP. The middle bar is overall (vs All). The bar on the right is vs RHP. You’ll notice that there is a lot of volatility from year to year for some players. Take Matt Wieters for example….
Wieters vs LHP is in the 100th percentile in 2011, while he was in the 1st percentile in 2010. As a switch hitter, it will be interesting to see if this trend continues in the future.
Finally, you’ve probably noticed that I’ve added the ability to look at individual seasons on the Batting Graph. I’ve added the number of Plate Appearances for each season to show the sample size.
Next, I plan on adding the same L/R wOBA to the pitcher’s graph.