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TwinsCentric: Signing Pelfrey is betting against the house

  • Blog Post by: John Bonnes
  • December 15, 2013 - 11:07 AM

The latest casino project in Las Vegas is going to cost seven billion dollars. That is an incredible gamble (*1), but there are reasons that investors make it. The first is that in the long run, the house always win. But the second is equally important: in the short run, anyone can win. If that wasn’t true, nobody would go to the casino, and there would be no reason to invest.

Mike Pelfrey, who the Twins will be signing for $11 million over two years, is an investment too. In the long run, he’s averaged out to a 4.48 ERA return, but that's like saying a roulette spin will come up blackish-red. He’s thrown about five-and-a-half seasons in the majors, and only once (4.74 ERA in 2011) has he ever come anywhere near that career ERA. Instead, he’s crushed it twice (3.72 in 2008 and 3.66 in 2010) and been crushed three times (5.57 in 2007, 5.03 in 2009, 5.19 last year). It doesn’t take a lot of advanced analysis to tell you that the Twins are betting against the house.

But the advanced stats tell us the same thing. Pelfrey’s success or failure each year has been almost entirely based on how many home runs he has given up. Home runs are highly dependent on whether or not a pitcher tends to be a ground ball pitcher or a fly ball pitcher, and Pelfrey is the latter. It’s hard for any pitcher to control what percentage of those fly balls turn to home runs, but there is some long-term trend to it, and Pelfrey has been very good at keeping fly balls from turning to home runs. Every year he has pitched in the majors, Pelfrey has been in the top half of pitchers in home run to fly ball ratio (HR/FB).

But the two years he was really good, he was elite in HR/FB, ranking 4th among qualified pitcher in 2008 and 9th in 2010. The other years, he wasn’t bad, but merely slightly above average. When Pelfrey has been successful, he’s been elite at doing something in which pitchers have very limited control. I don’t like to call that “luck,” but I also don’t like to call a good run at a blackjack table “luck.” I go with “secret sauce.” But whatever I call it, I don’t rely on it.

If this was a one-year deal, I could say that the Twins won’t need to rely on it either. But a multi-year deal changes how teams react. If Pelfrey isn’t effective, whether it’s luck or skill or the wind blowing out in Target Field (*2) this spring, it’s going to be hard to push him out of the rotation. Nobody is going to be anxious to give up on a player with that contract, especially given that Pelfrey is by all accounts a good guy and hard worker.

So the Twins are making a bigger bet than they should have against the house. They might have been emboldened to do so by their success with Kevin Correia, who paid off handsomely in his first year. The Twins have responded by doubling down instead of walking away with their winnings.

That’s a natural, human reaction. It’s also why they still keep building casinos.
 

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If you're wondering about those footnotes, clicking on them will take you to the same story on TwinsDaily with a couple of bonus pieces of information. There are also lot of other bonuses there, like lots of Mike Pelfrey reaction, Jason Kubel reaction and a fun December Mailbag.

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