April 2, 2014
Bonds vs. Pedro, and More Fun with Batter-Pitcher Matchups
As we talked about on Monday, Mike Trout has hit Felix Hernandez very well. After his first-inning home run on Opening Day, Trout is now hitting .441/.447/.794 in 38 plate appearances against Hernandez since being called up to the majors for good in April 2012. The question for the day, then, is this: How well should Mike Trout do against Felix Hernandez?
Which inevitably leads to this: How well would Bartolo Colon do in 600 at-bats against Craig Kimbrel? How many bases would Billy Hamilton steal if every pitcher in the league were Adam Wainwright? But we’re getting ahead of the intro.
To answer the Trout/Hernandez question, we turn to our old friend Log5, a Bill James invention that helps us determine how two teams with different winning percentages would fare against each other, and that can be tweaked slightly to tell us what a hitter of a certain skill level should do against a pitcher of a certain skill level. (Or observed performance level, since we're not regressing to determine each player's true talent over a given period.) If a batter who homers 20 percent more than the league average faces a pitcher who allows 20 percent more home runs than the league average, he should hit even more home runs. And so on. Intro. Words. Segue. Bold text:
Felix Hernandez (2012-2014) vs. Mike Trout (2012-2014)
Most comparable hitter: Matt Holliday (.297/.383/.492)
Most comparable pitcher: Randy Wolf (.313/.370/.510)
So Mike Trout turns Felix Hernandez into Randy Wolf. Felix Hernandez turns Mike Trout into Matt Holliday. See how this works? Onward!
Most comparable hitter: At the time, Bret Barberie, whose .301/.356/.406 line was good for a 97 OPS+. Today, the most similar line would probably be Alex Avila’s .236/.338/.381 since 2012, a 95 OPS+ (though one with a much lower batting average).
Bartolo Colon (career, as hitter) vs. Craig Kimbrel (2012)
I should note here that “walks” in this piece includes bases on balls and hit-by-pitches, and in the Colon/Kimbrel matchup all of the “walks” are hit by pitches. While a .034/.041/.034 line is fun, it’s actually Kimbrel’s line I’m more interested in. If he faced an all-Colon lineup for nine consecutive innings, he’d essentially average a one-hit shutout with 23 strikeouts. His chances of throwing a perfect game in any 27-batter stretch would be about one in three.
(Garza, incidentally, would hit .115/.121/.133 against Matt Garza.)
Billy Hamilton (projected 2014 season) vs. Adam Wainwright (2013), as measured in stolen bases
More to the point, though: PECOTA expects Hamilton to steal .59 bases for every time he reaches first. In this scenario, Hamilton would reach first base 131 times against an All-Wainwright league, and thus steal 78 bases.
Do we believe this? Do we believe that, facing Pedro Martinez 600 times, Bonds would put up a line that, even by 2000-2002 standards, is most comparable to Gary Sheffield’s? Certainly the walk rate is inflated, but do we believe that he’d slug .584? That, if the rest of the league got to face Kip Wells, Aaron Sele, Joe Kennedy and the like, and Bonds faced Martinez over and over and over, that he’d still be an MVP candidate? Boy. Boy, I don’t know. But I do know this, and this is officially my new favorite Barry Bonds Fun Fact ever:
From 2001 to 2004, Bonds had 138 plate appearances against pitchers in the same season that those pitchers got Cy Young votes. In those 138 plate appearances, Bonds hit .327/.522/.786.
Now, none of these pitchers, even in a Cy Young-candidacy season, was as good as Pedro in 2000 (though a number were lefties and/or Randy Johnson, giving them a sizeable platoon edge to boot). But still: Against Cy Young candidates! So I’m not ruling anything out.