2008 Game 19: Cleveland Indians vs. Minnesota Twins

Paul Byrd vs. Scott "Light Rail" Baker

Undoubtedly, we will hear a lot about how Byrd pitched well against the Twins last season. (It was the first thing that I thought of when I saw that Byrd was making the start today.) Over 4 starts, he threw 29 innings and had a 3.41 ERA. There are many reasons I don't think that's especially meaningful, but I'll focus on one for now: this isn't the same team as last year, even if the uniforms look the same. Looking at the active roster, the following players didn't play against Byrd last year: Young, Gomez, Harris, Lamb, Buscher, Monroe, Tolbert, and D-SPAN2. Now, maybe that group on the whole isn't as good as the group last year, but if Byrd had any sort of special magic against the Twins last year, there's not much reason to believe he still has some kind of special magic against this year's team.

Looking at the small sample size stats of current Twins against Byrd, it's kind of crazy. Five players have an OPS over .900, five players have an OPS below .600, and no one is anywhere in between.

Perhaps the most surprising thing on the list was that Mauer has hit only .208/.296/.250. 27 PA is almost enough to me make think maybe there's something there, but for the life of me, I can't think of a reason that a right-handed pitcher who throws strikes should be able to "own" Mauer. If we assume that every time Mauer faces Byrd, he is equally likely to be successful--which isn't a terrific assumption--then the variance in his OBP should be a binomial variable, to a good approximation. After 27 PA, though, one standard deviation of a binomial variable with p=.296 is something like .088. Mauer's career OBP against right-handed pitching is .416.

Mauer has faced nine different right-handed pitchers 20 times or more--Jason Johnson, Jeremy Bonderman, Jose Contreras, Freddy Garcia, Kevin Millwood, Jake Westbrook, Jon Garland, Paul Byrd, and Javier Vazquez. His OBP is more than one standard deviation below .416 against two of those pitchers--Byrd and Vazquez--and it is more than one standard deviation above .416 against none of those pitchers (though his .500 OBP against Jason Johnson is pretty close.) If the difference in his performance against those pitchers was just a matter of luck, we would probably wind up with a pretty similar result--so looking at the data, it's tough to say that Mauer has been anything other than unlucky against Byrd.

My point isn't so much that Mauer will start hitting Byrd better--my point is that we can't say that Mauer will continue to struggle just by looking at his 5 for 24 performance against Byrd. And for that matter, we can't tell whether or not Redmond will hit well against Byrd by looking at his 7 for 20 performance against Byrd. If there's some underlying cause that we can point to, I'd love to hear it and check into it, but the 5 for 24 isn't enough by itself.

Back to the "5 players over .900 OPS and 5 players under .900 OPS" point. I got to thinking it might be indicative of a platoon issue for Byrd, and sure enough, he's got a pretty big career platoon split--.240/.282/.413 against RHB and .311/.360/.492 against LHB. Delmon (in 6 AB), Redmond (in 20 AB), and Mauer (24 AB) have been exceptions to this pattern, but we expect to see some variance in the pattern. (I'll note here that two ex-Twins also have extreme performances against Byrd: Castillo (hitting lefty) hit .433/.514/.500 against Byrd in 35 PA, and Torii Hunter has hit .163/.192/.184 in 52 PA against Byrd.)

As such, I'd advise Gardy to get as many left-handed bats into the lineup as possible. Mauer needs a day off, so for now I'll hope there's some reason that Redmond has had success against Byrd. If Gardy doesn't want D-SPAN2 in the lineup, he might think about playing Lamb at 3B, Kubel in RF, and putting Buscher in at DH. I still can't really tell whether Tolbert hits better as a lefty or a righty, but it might be a good time to give Harris a day off. (Harris has made 12 straight starts and it might be nice to give him a rest for that reason alone.)

Yesterday gave us a pretty fun game, and hopefully we'll see more of the same today.

164 comments to 2008 Game 19: Cleveland Indians vs. Minnesota Twins