PECOTA Adjusts for Playing Time

February 18, 2011

Last week, Baseball Prospectus came out with their PECOTA predictions for the Nationals, and it wasn’t pretty. This week, they came out with their depth charts. This is basically their predictions, with playing time adjusted for what the lineup situation looks like right now. They also changed some of the underlying numbers to get their totals. I said I’d be shocked if they put the Nats at more than 60 wins, but they are actually predicted to get to 70 (Joy!). So there must be something positive out of this. There is, here’s a rundown of some of their adjustments, and a few other notes.

Let’s begin with the starting pitching

  • Jordan Zimmermann got better. He went from an 86 IP, 4.27 ERA guy to a 172 IP, 4.19 ERA guy. That puts him as the most valuable starter on the team, with 149 Ks and a 1.4 WARP.
  • Tom Gorzelanny joined the group, and got better. He was still listed on the Cubs, and maybe it was the ballpark, but his ERA was predicted to be 4.73. Now, on the Nats, he is predicted to be their 2nd best of the 5 main starters, with a 4.34 ERA, 105 Ks, and a 0.7 WARP, all ranked #2 behind JZimm. Perhaps because of injury history, they have him ranked #5 in IP.
  • Livan, Marquis and Lannan fill out the rotation, each with about a 0.10 ERA drop from last weeks predictions.
  • Lannan’s predictions still seem a little off. His PECOTA suggested 4.76 ERA would be his career low
  • Chien-Ming Wang does come back and pitch, according to them, and his 4.24 ERA is the best in the rotation after JZimm, but they only have him going 65 innings.

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