I ran the numbers through our park factor calculator today. Basically, the new parks come out as neutral. Citi get a 98/99 (batting/pitching) park factor and New Yankee gets a (98/97) park factor. Hyperventilation aside they are both very slight pitcher's parks. Whenever possible we use 3-year park factor which are an average of year N-1 and year N+1. When only two years are available we use year N-1 and year N and in the case of New Yankee and Citi we just use the current year. I also only use intra-league games since there is a home and home with every team in the league. Interestingly, if we include the inter-league games in our totals, we have only a percentage point change here or there.
I think we need to seriously rethink park factors and I've done a little bit of that, but don't have anything ready to use.
For now, I'm not going to tweak the park factors in the db. You should assume that Yankees and Mets hitters are slightly better than shown and the pitchers slightly worse, since I've been using 100/100 for the two parks.
Here are the 2009 3-year park factors if the season ended last night.
team_ID BPF_tot PPF_tot ARI 109.000 109.000 COL 109.000 109.000 CHC 108.000 106.000 BOS 106.000 104.000 SFG 104.000 104.000 TEX 104.000 104.000 DET 103.000 104.000 PHI 103.000 101.000 CHW 103.000 103.000 CIN 102.000 103.000 TBR 102.000 102.000 LAA 101.000 100.000 FLA 101.000 101.000 BAL 99.000 101.000 HOU 99.000 99.000 MIN 99.000 98.000 ATL 99.000 99.000 STL 98.000 97.000 TOR 98.000 98.000 OAK 98.000 98.000 NYY 98.000 97.000 KCR 98.000 99.000 WSN 98.000 99.000 NYM 98.000 99.000 MIL 97.000 97.000 SEA 96.000 97.000 LAD 96.000 94.000 PIT 96.000 97.000 CLE 94.000 95.000 SDP 88.000 89.000
This entry was posted on Tuesday, September 22nd, 2009 at 2:07 pm and is filed under Administration, Neutralize, Stats. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.