Who Faced Tougher Pitching: Tulo or Longoria?
Earlier this week on Twitter, I was part of a discussion comparing Troy Tulowitzki and Evan Longoria, two of the best players in the game. I personally give Longoria a slight edge, but obviously Tulowitzki is great, too. If someone prefers him to Longoria, that is fine, and I could probably be talked in to it. What really spurs this particular post is the discussion we had about comparing their offense. Keeping in mind that this was a casual discussion rather than a deep evaluation of “true talent” involving all of the necessary regression and adjustments, someone noted that over the last three seasons (2009-2011) the two players have had virtually identical offensive value per plate appearance: Tulowitzki has a 137 wRC+, and Longoria has a 136 wRC+. I argued that Longoria’s performance was more impressive given that the American League has superior pitching relative to the National League.
However, Dave Cameron made an interesting point: the Rockies play in the National League West, where hitters seemingly face s larger proportion of stud pitchers — Dave mentioned Tim Lincecum, Matt Cain, Madison Bumgarner, Clayton Kershaw, and Mat Latos in this connection. He also pointed out that Longoria did not have to face the Rays’ own excellent pitching staff. So I decided to look at it more closely. The point is not to settle the Longoria versus Tulowitzki dispute. Rather, I am interested in whether individual hitters face (or do not face) particular pitchers enough that they require a “divisional” adjustment of some sort.
