| | Batting statistics |
| | 1B - Single - hits on which the batter reached first base safely without the contribution of a fielding error. |
| | 2B - Double - hits on which the batter reached second base safely without the contribution of a fielding error. |
| | 3B - Triple - hits on which the batter reached third base safely without the contribution of a fielding error. |
| | AB - At bat - Batting appearances, not including bases on balls, hit by pitch, sacrifices, interference, or obstruction |
| | AB/HR At bats per home run - at bats divided by home runs |
| | BA - Batting average (also abbreviated AVG) - hits divided by at bats |
| | BB - Base on balls (also called a "walk") - times receiving four balls and advancing to first base |
| | BBP - Walk percentage (also abbreviated BB%, W/AB) - number of base on balls divided by plate appearances |
| | BB/K - Walk-to-strikeout ratio - number of base on balls divided by number of strikeouts |
| | EBH - Extra base hit (Sometimes EB or XBH) - a double, triple, or home run |
| | FC - Fielder's choice - times reaching base when a fielder chose to try for an out on another runner |
| | G/F - Ground ball fly ball ratio - number of ground balls divided by number of fly balls |
| | GIDP - Ground into Double play - number of ground balls hit that became double plays |
| | GS - Grand Slam - a home run with the bases loaded, resulting in four runs scoring, and four RBI credited to the batter. |
| | H - Hit - times reached base because of a batted, fair ball without error by the defense |
| | HBP - Hit by pitch - times touched by a pitch and awarded first base as a result |
| | HR - Home run - hits on which the batter successfully touched all four bases, without the contribution of a fielding error. |
| | IBB - Intentional base on balls A base on balls (see BB above) deliberately thrown by the pitcher. Also known as IW (intentional walk). |
| | K or SO - Strike out - number of times that strike three is taken or swung at and missed, or bunted foul |
| | LOB - Left on base - number of runners not out nor scored at the end of an inning. |
| | OBP - On base percentage (also abbreviated OBA for on base average) - times reached base (H + BB + HBP) divided by at bats plus walks plus hit by pitch plus sacrifice flies (AB + BB + HBP + SF). |
| | OPS - On-base plus slugging - on-base percentage plus slugging percentage |
| | PA - Plate appearance - number of completed batting appearances no matter the result |
| | R - Run - times reached home base legally and safely |
| | RC - Runs created - statistic that attempts to measure how many runs a player has contributed to his team |
| | RBI - Run batted in - number of runners who scored due to a batters's action, except when batter grounded into double play or reached on an error |
| | SF - Sacrifice fly - number of fly ball outs which allow another runner to score |
| | SH - Sacrifice hit - number of ground outs which allows another runner to advance |
| | SLG - Slugging percentage (also abbreviated SP%) - total bases divided by at-bats |
| | TA - Total average - total bases, plus walks, plus steals, divided by plate appearances plus caught stealing |
| | TB - Total bases - one for each single, two for each double, three for each triple, and four for each home run |
| | TOB - Times on base - times reaching base as a result of hits, walks, and hit-by-pitches |
| | Baserunning statistics |
| | CS - Caught stealing - times tagged out when attempting to steal. |
| | SB - Stolen base - number of bases advanced other than on batted balls, walks, or hits by pitch. |
| | Pitching statistics |
| | A or G - Appearances or Games (also abbreviated GP, for Games Pitched) - number of times a pitcher pitches in a season |
| | AVG or BAA - Opponents batting average or Batting Average Against - hits allowed divided by at-bats faced |
| | BB - Base on balls (also called a "walk") - times pitching four balls, allowing runner to advance to first base |
| | BB/9 - Base on balls times nine divided by innings pitched (also known as BB/9IP - Bases on balls per 9 innings pitched) |
| | BK - Balk - number of times pitcher commits an illegal pitching action or other illegal action while in contact with the pitching rubber, thus allowing baserunners to advance |
| | BSV - Blown save (also abbreviated BS) - number of times entering the game in a save situation, and being charged the run which ties the game. |
| | CG - Complete game - number of games where player was the only pitcher for his team |
| | dERA - Defense-Independent ERA - a measure of a pitcher's effectiveness that doesn't include balls hit within the field of play |
| | ER - Earned run - number of runs that did not occur as a result of errors or passed balls |
| | ERA - Earned run average - earned runs times innings in a game (usually nine) divided by innings pitched |
| | GIR - Games in relief - number of games pitched where player was not the starting pitcher for his team |
| | GF - Games finished - number of games pitched where player was the final pitcher for his team |
| | G/F - Ground ball fly ball ratio - ground balls allowed divided by fly balls allowed |
| | GS or S- Games started or starts - number of games pitched where player was the first pitcher for his team |
| | H/9 - Hits per nine innings - hits allowed times nine divided by innings pitched (also known as H/9IP - Hits allowed per 9 innings pitched) |
| | H or HA - Hits Allowed - total hits allowed |
| | HB - Hit batsman - times hit a batter with pitch, allowing runner to advance to first base |
| | HLD (or H) - Hold - number of games entered in a save situation, left in save situation, recorded at least one out, and not having surrendered the lead |
| | HR or HRA - Home runs allowed - total home runs allowed |
| | IBB - Intentional base on balls |
| | IRA - Inherited runs allowed - number of runners allowed to score who were on base when pitcher enters the game |
| | IP - Innings pitched - number of outs recorded while pitching divided by three |
| | K - Strikeout - number of batters who received strike three |
| | K/9 - Strikeouts per nine innings - strikeouts times nine divided by innings pitched (also known as K/9IP - Strikeouts per 9 innings pitched) |
| | K/BB - Strikeout-to-walk ratio - number of strikeouts divided by number of base on balls |
| | L - Loss - number of games where pitcher was pitching while the opposing team took the lead, never lost the lead, and went on to win |
| | P or PC - Pitch Count |
| | P/GS - Average number of pitches thrown per game started |
| | R/9 - Runs per nine innings - number of runs allowed times nine divided by innings pitched |
| | SHO - Shutout - number of complete games having allowed zero runs |
| | S or SV - Save - number of games where the pitcher enters a game led by the pitcher's team, finishes the game without surrendering the lead, is not the winning pitcher, and either (a) the lead was three runs or less when the pitcher entered the game; (b) the potential tying run was on base, at bat, or on deck; or (c) the pitcher pitched three or more innings |
| | SVO - Save Opportunities - number of chances to earn S |
| | TBF - Total batters faced - opponent's total plate appearances |
| | W - Win - number of games where pitcher was pitching while his team took the lead and went on to win (also related: winning percentage) |
| | W+S - Relief wins plus saves - wins plus saves |
| | WHIP - Walks plus hits per inning pitched - bases on balls plus hits divided by innings pitched |
| | W/9 - Walks per nine innings - bases on balls times nine divided by innings pitched (also known as BB/9IP - Bases on balls per 9 innings pitched) |
| | WP - Wild pitches - charged when a pitch is too high, low, or wide of home plate for the catcher to field, thereby allowing one or more runners to advance or score |