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There are many terms for various statistics in baseball, most of them with abbreviations. Below are a list of abbreviations, their full names, and their meanings, as used in the Pitching tables.

Primary Statistics[]

Gm[]

Games played by that player in that year (including part games).

ERA[]

Earned Run Average (calculated by 9*ER/IP )

W[]

Wins credited to that pitcher

L[]

Losses credited to that pitcher

Pct.[]

Winning Percentage (calculated by W/(W+L) )

G[]

number of Games that pitcher appeared in

GS[]

number of Games Started by that pitcher

CG[]

number of Complete Games pitched by that pitcher (start to finish, alone)

SHO[]

number of Shutouts pitched by that pitcher (did not allow the other team to score a run

Inn[]

number of Innings pitched by that pitcher (each out recorded is one-third of an inning, creating .3 - one out recorded, and .7 - two outs recorded)

H[]

number of Hits given up by that pitcher to opposing batters

HR[]

number of Homeruns given up by that pitcher to opposing batters

BB[]

number of Base on Balls (or Walks) given up by that pitcher to opposing batters

SO[]

number of Strikeouts recorded by that pitcher on opposing batters

OBA[]

Opponent's Batting Average - a measure of how well the opposing batters hit that pitcher (calculated by H/OAB)

Secondary Statistics[]

Hld[]

number of Holds credited to that pitcher

GF[]

number of Games Finished by that pitcher

SV[]

number of Saves credited to that pitcher

BS[]

number of Blown Save opportunities charged to that pitcher

SV%[]

the successful Save Percentage - calculated by SV/(SV+BS)

IR[]

number of Inherited Runners (runners already on base when that pitcher was brought into the game)

ISP[]

number of Inherited runners in Scoring Position (runners already on second- and/or thirdbase when that pitcher was brought into the game)

IRS[]

number of Inherited Runners allowed to Score (runners already on base when that pitcher was brought into the game who eventually scored while that pitcher was on the mound)

IRSc%[]

Inherited Runners Scoring Percentage - calculated by IRS/IR

R[]

total number of Runs given up by that pitcher

ER[]

number of Earned Runs given up by that pitcher (runs that would only have scored had defensive errors not been made)

IBB[]

number of Intentional Base on Balls (or Intentional Walks)

HBP[]

number of opponent batters Hit By Pitches

DP[]

number of Double Plays made by the defense when that pitcher was on the mound

Tertiary Statistics[]

OAB[]

number of Opponents' At Bats

DO[]

number of Doubles (a two-base hit) given up by that pitcher

TR[]

number of Triples (a three-base hit) given up by that pitcher

XBH[]

number of Extra Base Hits (hits that were not singles, but doubles, triples and homeruns) given up by that pitcher

OOBP[]

Opponents' On Base Percentage - (H+ BB + HBP)/(OAB+BB+SF+HBP) (SF and HBP are assumed zero if unavailable)

OSLG[]

Opponents' Slugging average - (SI + 2*DO + 3*TR + 4*HR)/OAB

OPRO[]

the opponents' Production - calculated by OOBP+OSLG

WP[]

number of Wild Pitches made by that pitcher

BK[]

number of Balks made by that pitcher

WHIP[]

"Whip" - stands for (Walks+Hits)/Innings Pitched

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