Defensive Efficiency Record
From SABR Encyclopedia
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- | <math>PM1 = PO - K - DP - CA - OFA</math> | + | <math>PM1 = PO - K - DP - CA - OFA\, </math> |
- | where CA is total assists for team's catchers | + | |
- | and OFA is total assists for team's outfielders. | + | where |
+ | * CA is total assists for team's catchers, and | ||
+ | * OFA is total assists for team's outfielders. | ||
+ | |||
<math>PM2 = BFP - K - H - W - HBP - 5\;\times\;E/6</math> | <math>PM2 = BFP - K - H - W - HBP - 5\;\times\;E/6</math> |
Latest revision as of 06:01, 14 December 2009
Defensive Efficiency Record (DER) is a baseball statistic invented by Bill James to estimate the percentage of balls put in play by the opposition that a team's defense turned into outs. DER was privately published by James in 1980[1] and first publicly published in 1982 [2]. Like Fielding Percentage, DER is shown with three decimal places.
[edit] Formula
The process is to take the average of two estimates of plays made (PM) and divide by the estimated total of balls put in play.
where
- CA is total assists for team's catchers, and
- OFA is total assists for team's outfielders.