Basic Baseball Stats Abbreviations

Knowing the meanings of basic baseball statistics abbreviations can make an already exciting game even more fascinating to watch. A manager’s decision to replace a pitcher in the 7th inning, for example, means a lot more if you know the relief pitcher’s W+S and BS percentages. Read on to learn the meanings of important baseball abbreviations and how they affect a team’s performance.

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Offensive Statistics Abbreviations

Hey, batter batter - swing! Watching a batter make their way from the strike zone to the infield is an exciting part of the game. Here is a list of abbreviations for batters and runners as they attempt to put points on the board.

Batting Abbreviations

What’s the difference between a batter’s AB and BA? Become an expert at batting lingo and statistics with these abbreviations.

  • 1B or S - Singles

  • 2B - Doubles

  • 3B - Triples

  • AB - At Bats

  • AB/HR - At Bats per Home Run

  • AO - Fly Outs (Air)

  • BA or AVG - Batting average 

  • BB - Bases on Balls (Walks)

  • BABIP - Batting Average on Balls in Play

  • BB/K - Walks to Strikeouts

  • BR or BsR - Base Runs

  • EQA - Equivalent Average

  • GIDP - Ground into Double Plays

  • GO/AO - Ground Balls to Fly Balls

  • GS or GRSL - Grand Slams

  • H - Hits

  • HBP - Hit by Pitch

  • HRR - Home Run Ratio

  • HR - Home Runs

  • HR/H - Home Runs per Hit

  • ITPHR - Inside The Park Home Run

  • ISO - Isolated Power

  • K or SO - Strikeouts

  • OBP - On-Base Percentage

  • OPS - On-Base Plus Slugging

  • PA - Plate Appearance

  • PA/SO - Plate Appearances per Strikeout

  • RBI - Runs Batted In

  • RC - Runs Created

  • RISP - Runner In Scoring Position

  • RP - Runs Produced

  • SF - Sacrifice Flies

  • SH - Sacrifice Hits (bunts)

  • SLG - Slugging Average

  • TA - Total Average

  • TB - Total Bases

  • TOB - Times on Base

  • XBH - Extra Base Hits

Baserunning Abbreviations

The batter got on base – now what? A player’s SB% becomes very important when they are considering their options at second base. Check out these abbreviations that can help you predict whether a runner will stay put or go for the steal.

  • CS - Caught Stealing

  • DI - Defensive Indifference

  • LOB - Left on Base (Runners)

  • R - Runs

  • SB - Stolen Bases

  • SB% - Stolen Base Percentage

  • SBA or ATT - Stolen Base Attempts

  • SBR - Stolen Base Runs

  • UBR - Ultimate Base Running

Defense Statistics Abbreviations

A high-quality pitcher can define the flow and results of a baseball game. Unfortunately, a low-quality pitcher can do the same thing. See how fielders’ and pitchers’ statistics can affect a baseball team’s infield and outfield defense.

Fielding Abbreviations

What makes a first baseman worth watching? What about an outfielder? Learn your way around fielding statistics with these abbreviations.

  • A - Assists

  • CI - Catcher’s Interference

  • DP - Double Plays

  • E - Errors

  • FP - Fielding Percentage

  • GP - Games Played

  • INN - Innings (in a certain position)

  • OFA - Outfield Assists

  • PB - Passed Balls

  • PK - Pickoffs

  • PO - Putouts

  • TC - Total Chances (assists + putouts + errors)

  • TP - Triple Plays

  • UZR - Ultimate Zone Rating

Pitching Abbreviations

Pitching statistics can make or break a team’s defense. Read these baseball abbreviations to see what’s valuable – and what’s risky – in a pitching bullpen.

  • BB - Walks (Bases on Balls)

  • BB/9 - Bases on Balls per 9 Innings

  • BF - Batters Faced

  • BFP - Batters Facing Pitcher

  • BK - Balks (Illegal Pitching Actions)

  • BS - Blown Save

  • CERA - Component ERA

  • CBO - Combined Shutout

  • CG - Complete Games

  • CGL- Complete Game Losses

  • DICE - Defense-Independent Component ERA

  • ER - Earned Runs

  • ERA - Earned Run Average

  • G or GP - Games (pitched)

  • GF - Games Finished

  • GIDP - Double Plays or Double Play Groundouts Induced

  • GIDPO - Double Play Opportunities

  • GIR - Games in Relief

  • GO - Ground Outs

  • GO/AO - Ground Outs to Fly Outs

  • GS - Games Started

  • FIP - Fielding Independent Pitching

  • H or HA - Hits Allowed

  • H/9 or HA/9 - Hits Allowed over 9 Innings

  • HB or HBP - Hit Batters

  • HLD or H - Hold

  • HR or HRA - Home Runs Allowed

  • IBB or IW - Intentional Walks (Balls on Bases)

  • IP - Innings Pitched

  • IP/GS - Innings Pitched per Games Started

  • IPS - Innings Per Start

  • IR - Inherited Runners

  • IRA - Inherited Runs Allowed

  • K - Strikeouts

  • K/9 or SO/9 - Strikeouts per 9 Innings

  • L - Losses (while pitching)

  • LOB - Left on Base

  • LOB% - Left on Base Percentage

  • OBA - Opponents' Batting Average

  • PC-ST - Pitch Count and Strike Count within those pitches

  • PIT or NP - Pitch Count

  • MB9 - Baserunners Per 9 Innings

  • PFR - Power Finesse Ratio (strikeouts + walks divided by innings pitched)

  • QOP - Quality of Pitch

  • QS - Quality Start

  • RA - Run Average (runs allowed over 9 innings)

  • RPF - Relief Failures

  • RW - Relief Wins

  • S/SHO - Shutouts

  • SIERA - Skill-Interactive Earned Run Average

  • K/SO - Strikeouts

  • SV - Saves

  • SVO - Save Opportunities

  • W - Wins

  • W+S - Relief Wins and Saves

  • WHIP - Walks and Hits per Innings Pitched

  • WP - Wild Pitches

NERD Statistics

You may see the acronym NERD when discussing baseball abbreviations. NERD is a sabermetrics term that stands for Narration, Exposition, Reflection, and Description.

It consists of a mathematical formula that assesses the aesthetic value of watching a pitcher (pNERD) or a team (tNERD) play based on various performance statistics.

More Sports Resources

No matter what season we’re in, it’s always time for sports! If you’d like to learn more about baseball abbreviations, check out a list of codes for baseball scorecards and scoreboards. Or you can expand your sports knowledge with an article that lists abbreviations for every FIFA football association in the world. 

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