MLB Statistics Glossary

Updated: May 1, 2013, 12:00 PM ET

 

BATTING STATISTICS
#P/PAPitches seen per plate appearance
2BDoubles
3BTriples
ABAt-bats
AvgBatting average
H divided by AB
BBBases on balls
BB/KWalks Per Strikeout
BB/PAWalks Per Plate Appearance
CI Catcher Interference
CSCaught stealing
FBFly balls hit, excluding home runs
GGames played
G/FGround ball/fly ball ratio
GB divided by FB
GIDPGrounded into double play
H Hits
HBPHit by pitch
HRHome runs
IBBIntentional bases on balls
IsoPIsolated Power
(Slugging Percentage - Batting Average)
LOBRunners left on base
OBPOn-base percentage
(H + BB + HBP) divided by (AB + BB + HBP + SF)
OPSOn-base percentage plus slugging percentage. See OBP, above, and Slg, below, for definitions
OW%Offensive winning percentage. The theoretical winning percentage of a team comprising nine of the same players (e.g. nine Ken Griffey Jrs.).
1) Figure runs created per 27 outs [Note: Total outs = (AB - H + C + GIDP + SH + SF)]. 2) Divide by league average runs per game. 3) Square the result. 4) Divide that figure by 1 + itself
Qualified year-to-dateIn order to qualify for batting titles in averaged categories (Avg, Slg, OBP, OPS, RC, OW%, #P/PA, G/F), a player must average at least 3.1 plate appearances for every game his team has played. Sorting by qualified year-to-date excludes all players not currently on pace to reach that minimum
RRuns
RBIRuns batted in
RCRuns created
[(H + BB + HBP - CS - GIDP) times (Total bases + .26[BB - IBB + HBP] + .52[SH + SF + SB])] divided by (AB + BB + HBP + SH+ SF)
RC27Runs created per 27 outs (Estimates how many runs per game a team made up of nine of the same player would score)
SBStolen bases
SecASecondary Average (A way to look at a player's extra bases gained, independent of Batting Average)
(TB - H + BB + SB - CS) / AB
SFSacrifice flies
SHSacrifice hits
SlgSlugging percentage
TB divided by AB
SOStrikeouts
TBTotal bases
Hits + 2B + (3B times 2) + (HR times 3)
TPATotal plate appearances
AB + BB + HBP + SF + SH + times reached on defensive interference
WARShort-hand for wins above replacement. This stat measures the number of wins a player contributes relative to a freely available minor leaguer. OWAR is the offensive compenent and DWAR is the defensive component. The sum of the two is the total WAR. For more on WAR, read this piece from David Schoenfield.
XBHExtra Base Hits
2B + 3B + HR

PITCHING STATISTICS
#P/IPPitches thrown per inning
#P/GSPitches thrown per start
#PitPitches thrown
2BDoubles allowed
3BTriples allowed
AGSAverage Game Score. See Game Score, below
AvgBatting average allowed
BBBases on balls
BIPABalls In Play Average. Batting Average Against, not including home runs or strikeouts.
BkBalks
BlSvBlown saves. See SvOp, below, for definition of a save situation
CGComplete games
CSRunners caught stealing
CWCheap Wins. Wins in games started that are not Quality Starts.
DecDecision (Win, loss)
DIPS ERAA pitcher's ERA, independent of the defense behind him. This formula, based on essays by Voros McCracken, assumes that all pitchers have consistent BIPA (See Above), and adjusts accordingly. The DIPS ratios on ESPN use the DIPS 2.0 formula, are not park-adjusted, and do not adjust for knuckleball pitchers.
EREarned runs
ERAEarned-run average
(ER times 9) divided by IP
ERCComponent ERA. A pitcher's ERA based on the hits and walks he allowed, rather than actual runs.
ERC%Ratio of Component ERA to actual ERA
FBFly balls hit against
G/FGround ball/fly ball ratio against
GB divided by FB
GBGround balls hit against
GIDPGrounded into double plays against
GFGames finished
GSGames started
GScGame Score. Start with 50 points. Add 1 point for each out recorded, (3 points per inning). Add 2 points for each inning completed after the 4th. Add 1 point for each strikeout. Subtract 2 points for each hit allowed. Subtract 4 points for each earned run allowed. Subtract 2 points for each unearned run allowed. Subtract 1 point for each walk.
HHits against
HldHolds. Earned when a relief pitcher enters a game in a save situation (see SvOp, below, for definition), records at least one out, and leaves the game without having given up the lead
HRHome runs allowed
IBBIntentional bases on balls
IPInnings pitched
IRInherited runners. Runners on base when a relief pitcher enters a game
LLosses
OBPOn-base percentage allowed. See OBP in Batting Statistics, above, for definition of OBP
ORunsOpponents' runs scored (average, per nine innings pitched) while the pitcher of record.
PFRPower/Finesse Ratio Strikeouts Plus Walks Divided By Innings Pitched
Qualified year-to-dateIn order to qualify for pitching titles in averaged categories (ERA, WPct, #P/IP, RS, ORuns, Slg, OBP, Avg, CS%, G/F), a player must average at least one inning pitched for every game his team has played. Sorting by qualified year-to-date excludes all players not currently on pace to reach that minimum
QSQuality starts
RRuns
RBIRuns batted in allowed
RelRelief decision (Save, blown save, hold)
RSRun support. Team's runs scored (average, per 9 innings pitched) while the pitcher of record
SBStolen bases allowed
SFSacrifice flies allowed
SHSacrifice hits allowed
ShOShutouts
SlgSlugging percentage allowed. See Slg in Batting Statistics, above, for definition
SOStrikeouts
SvSaves. Earned when a pitcher finishes a game without having given up the lead after entering in a save situation (see SvOp, below, for definition)
SvOpSave opportunities. When a pitcher 1) enters the game with a lead of three or fewer runs and pitches at least one inning, 2) enters the game with the potential tying run on base, at bat, or on deck, or 3) pitches three or more innings with a lead and is credited with a save by the official scorer
TBFTotal batters faced
TLTough Losses. Losses in games started that are Quality Starts.
WHIPWalks plus hits divided by Innings Pitched
WWins
WPctWinning percentage
Wins divided by (Wins + losses)
WPWild pitches

FIELDING STATISTICS
AAssists
CERACatcher's earned-run average. Earned-run average of club's pitchers with a particular catcher behind the plate
CSRunners caught stealing
CS%Percentage of runners caught stealing
DPDouble plays
EErrors
FPctFielding percentage
(PO + A) divided by (PO + A + E)
GGames played
GSGames started
InnInnings
PBPassed balls
PCSPitchers' caught stealing. Total runners caught stealing when the player who initiates the fielding play is the pitcher
POPutouts
POAPickoff attempts
Qualified year-to-dateIn order to qualify for fielding titles in averaged categories (FPct., RF, CS%, CERA), a player must meet the following qualifiers: Catchers must play 1/2 of their team's games; Pitchers must average at least one inning pitched for each of their team's games; Position players must play 2/3 of their team's games. Sorting by qualified year-to-date excludes all players not currently on pace to reach that minimum
RFRange factor
(PO + A) divided by 9 innings
SBAStolen bases allowed
TCTotal chances