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Park-Adjusted Defensive Efficiency: Measures the percentage of balls in play that a team's defense converts into outs, with a park adjustment factor.

Based off of Bill James' Defensive Efficiency idea, PADE calculates how well a team performed on defense, while adjusting for their park environments. Certain parks make it easier for the defense to turn a ball in play into an out and this adjusts for that fact.

Introduced by James Click here and updated by Click here.

Here is an example of the Park-Adjusted Defensive Efficiency spectrum based on the 2011 season:

Excellent - Tampa Bay 4.30
Great - Los Angeles of Anaheim 1.47
Average - Atlanta -0.02
Poor - Chicago (A) -1.41
Horrendous - Minnesota -2.41

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