Glossary - Seamheads Negro Leagues Database

Glossary

Glossary Links
Baseball-Reference FanGraphs SABR Guide Wikipedia The Hardball Times
MLB.com Baseball Prospectus ESPN Sabermetrics (Wiki) Baseball-Almanac

Defensive Regression Analysis (DRA)

Counting Stats

G = Games
GS = Games Started
Inn = Innings
PO = Putouts
A = Assists
E = Errors
DP = Double Plays
PB = Passed Balls
WP = Wild Pitches
SB = Stolen Bases
CS = Caught Stealing

Rate Stats

Fld% = Fielding Percentage ((PO + A) / (PO + A + E))
RF = Range Factor = ((PO + A) * 9 / Inn)


Defensive Regressino Analysis (DRA)

DRA was created by Michael Humphreys and its method is described in the book Wizardry. He has provided the data for seasons from 1893-2009. The remaining years (1871-1892 & 2010-present) have been calculated by The Baseball Gauge.

DRA Categories


Runs

Total runs saved from all categories below.


Range

Runs Saved from a fielder's range. Catchers are not included.


Rate

Total runs saved per 1000 innings.


A2

Runs Saved from catcher's assists in the field, caught stealings, and stolen bases allowed.


PB

Runs Saved from catchers avoiding passed balls.


Arm

Runs saved from outfield assists


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