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Baseball Glossary of Statistics

Assists (A)Number of times a defensive player assisted on an out. Not counted if the play results in an error. Example: Batter hits a ball to the shortstop who throws to first base, where the batter is out. The shortstop gets an assist.
At Bat (AB)Number of times a player has been up to bat. Not counting the times the plate appearance resulted in a walk, hit by pitch, sacrifice bunt, or sacrifice fly.
Batting Average (AVG)Number of base hits per at bat. Naturally, a higher number is better.
Formula: (Base Hits) / (At Bats)
Bats (B)From the pitchers view, which side of the plate the batter stands.
Base On Balls (BB)When a batter is awarded first base as a result of four balls being pitched outside the strike zone.
Note: Intentional walks IBB are also included here.
Bench (BCH)Lineup position for player who showed up for the game but did not get any play time.
Batters Faced (BF)Number of batters who made a plate appearance before the pitcher.
Balks (BK)Penalty for an illegal movement by the pitcher. The rule is designed to prevent pitchers from deliberately deceiving the runners. If called, baserunners advance one base.
Complete Games (CG)When a starting pitcher records all 27 outs. Game may end in a win or a loss.
Catcher Interference (CI)When a catcher intentionally or inadvertently physically hinders a batter from the opportunity to legally swing at a pitched ball, and for which the catcher is charged an error.
Caught Stealing (CS)A runner is caught stealing when, during an errorless play, he is:
thrown out while trying to steal a base
picked off a base while trying to advance
overslides while stealing and is put out
Caught Stealing Percentage (CS%)Percentage of players put out while trying to steal a base.
Formula: Caught Stealing / (Caught Stealing + Stolen Bases Allowed)
Doubles (2B)Number of hits that resulted in the batter reaching second base.
Double Plays (DP)When one continuing play results in two outs.
Designated Player (DP)Player designated to bat only for one of the 9 starting defensive players.
Error (E)When a fielder misplays a ball hit at him, which under normal circumstances would result in an out.
Earned Runs (ER)Any run that is directly attributable to the pitcher.
Earned Run Average (ERA)Represents the average number of runs given up by a pitcher during a game.
Formula: (Earned Runs x Innings Per Game) / (Innings Pitched)
Extra Player (EP)Player added to lineup who bats as a 10th player in the linuep.
Fielding Percentage (FLD%)Number of attempts that resulted in an out compared to the number of total attempts.
Formula: (Putouts + Assists) / (Putouts + Assists + Errors)
Flexible Player (FLEX)Player chosen to play defense for the designated player.
Games (G)Number of games the player has played in.
Games Started (GS)Number of games a player was in the lineup when the first pitch was thrown.
Hits or Hits Against (H)Number of hits a batter safely reaches a base on not including walks or sacrifices. For pitchers, the number of hits given up while pitching.
Hit By Pitch (HBP)Number of times a batter is struck by a pitch.
Home Runs (HR)Number of hits that resulted in a home run.
Intentional Base On Balls (IBB)When a pitcher intentionally throws four pitches far outside the strike zone to walk the batter.
Note: IBBs are included in the BB total.
Innings Pitched/Played (INN)Cumulative number of innings (including fractional innings) pitched/played by a pitcher/fielder. A full inning pitched is 3 outs. A pitcher relieved after one out is represented by .1. After two outs is .2.
Losses (L)Number of games a particular pitcher’s performance resulted in a loss.
Number (No)The players number for easy recognition by fans. Generally on the jersey of the player.
Opponent Batting Average (OBA)Percentage of hits against a pitcher.
Formula: (Hits) / (Batters Faced)-(Walks+HBP+Sac Flies+Sac Bunts+Catcher Interference)
On Base Percentage (OBP)Represents the number of times the player reaches base compared to the number of plate appearances. The higher the number the better.
Formula: (Hits + Walks + Times Hit by Pitch) / (At Bats + Walks + Times Hit by Pitch + Sacrifice Flys)
On Base Plus Slugging (OPS)On-base percentage plus slugging percentage.
See OBP, above, and SLG, below, for definitions
Plate Appearances (PA)Number of times a batter faces a pitcher, regardless of outcome.
Formula: At Bats + Walks + Times Hit by Pitch + Sacrifice Bunts + Sacrifice Flys
Passed Balls (PB)Number of times a ball thrown by the pitcher was not handled by a catcher and resulted in a base runner advancing.
Pitch Count (PC)The total number of pitches a pitcher has thrown.
Put Outs (PO)Number of times a defensive player was the final player in a play, which resulted in an out.
Position (Posn)Any one of nine available field locations.
Reached On Error (ROE)When a batter reaches base due to defensive error when under normal circumstances the batter would have clearly been out.
Counts as an at bat but not as a hit.
Runs (R)Number of times a batter crosses home plate.
Runs Batted In (RBI)Number of runners a batter moves across home plate resulting from his hit, walk or sacrifice.
Sacrifice Bunts (SacB)When a bunt results in the current base runner advancing a base and an out for the batter.
Sacrifice Flies (SacF)There must be fewer than 2 outs. The ball must be hit to the outfield. The batter is out – ball is caught on a fly. A runner on base scores on the play and the ball is caught. (The batter gets an RBI. The base runner gets a Run Scored. The Sacrifice Fly is not counted as an official At Bat. The Fielder gets credited with a Put Out.)
Stolen Bases (SB)Number of times a base runner successfully advances to the next base without the help of the hitter.
Stolen Bases Allowed (SBA)Number of times a catcher allows a base runner to steal a base.
Shut Outs (SHO)When a starting pitcher leaves the game without surrendering a run and is given a win for his performance.
Slugging Percentage (SLG)Total number of bases a batter reaches divided by at bats.
Strike Out (SO)Number of times a batter swings and misses on three pitches.
Saves (SV)Number of times a relief pitcher finishes a game where the potential tying or winning run is on base, at home plate or in the on-deck circle. Also the number of times a relief pitcher pitches the final three innings of a win; or the number of times a reliever pitches one inning or more in which he protects a lead of three runs or less.
Save Opportunities (SVO)Number of times a relief pitcher enters a game in which one of the three situations under the definition of a save presents itself.
Throws (T)Hand in which the player throws the ball while fielding or pitching.
Total Bases (TB)Total number of bases a batter has reached.
Total Chances (TC)Putouts plus assists plus errors; total chances offered, not total chances accepted.
Team (TEAM)Team in which the player is currently on or was once a member of.
Triple Plays (TP)When one continuing play results in three outs.
Triples (TR)Number of hits that resulted in the batter reaching third base.
Wins (W)Number of games that resulted in a win for a pitcher or a team.
Walks & Hits per Inning Pitched (WHIP)Average number of walks and hits allowed by the pitcher per inning.
Formula: (Hits + Walks) / Innings
Wild Pitches (WP)Number of times a pitcher threw a ball, which was not handled by the catcher and resulted in a base runner advancing.
Year (YEAR)When the stats were recorded.