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Thursday, December 20, 2007

Mitchell and the Outfield

Today in my column at BP I take a look at two topics that couldn't be more different. First, I give my take on the Mitchell report and then delve into outfield defense in a continuation of my series on Simple Fielding Runs (SFR).

One of the goals that prompted looking at creating a fielding system with retrosheet style play by play data was to combine the outfield SFR ratings with the throwing arm ratings (Equivalent Throwing Runs) I developed for an essay to be published in Baseball Prospectus 2008. The final table in today's columns shows the two measures side by side for all outfielders in 2007 who played in 80 or more adjusted games (9-inning equivalents). I did not, however, total them up by team and so here are the totals for each team in 2007. Note that the SFR values are a first pass and are park adjusted using a three-year factor. Those adjustments I believe lead to the imbalance you see with more teams coming out positive. I haven't looked into it deeply but that's my assumption anyway.

Also, just a reminder that I'll be chatting at BP tomorrow at 11AM Mountain, 1PM Eastern. Hope to see you there.


2007 Outfield Defense
Team Balls SFR EqThr Total
BOS 2100 65.0 -0.9 64.1
CHN 2081 46.5 11.9 58.4
NYN 2206 29.2 -6.1 23.1
WAS 2394 29.2 -7.0 22.2
COL 2202 27.0 -1.8 25.2
ARI 2207 25.3 1.0 26.3
ANA 2268 20.5 0.0 20.5
TEX 2250 20.2 3.1 23.2
FLO 2366 16.7 4.6 21.3
TOR 2010 13.3 8.5 21.8
DET 2286 10.0 4.7 14.7
CLE 2248 9.6 -7.5 2.1
NYA 2340 7.3 6.5 13.8
CHA 2290 2.8 -6.2 -3.4
HOU 2259 1.9 -2.1 -0.2
LAN 2120 1.4 -14.6 -13.2
CIN 2418 0.8 -1.2 -0.4
KCA 2426 -2.1 3.9 1.8
PIT 2315 -2.9 1.8 -1.0
ATL 2191 -3.9 13.0 9.0
MIL 2294 -4.5 -4.2 -8.7
BAL 2243 -5.0 1.4 -3.6
OAK 2231 -11.3 -16.8 -28.1
PHI 2249 -15.5 13.5 -2.0
MIN 2216 -19.5 2.8 -16.7
SDN 2153 -19.6 -10.4 -30.1
TBA 2318 -22.9 11.4 -11.5
SLN 2266 -24.6 -1.6 -26.3
SFN 2242 -32.2 -5.3 -37.5
SEA 2296 -38.1 6.2 -31.9

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