Pitching stats glossary

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Balls B

The number of pitches thrown by a pitcher that are deemed outside the strike zone by the umpire, resulting in a ball being called.

Batters Faced BF

The number of individual batters a pitcher faces during a game or specific time frame.

Breaking Ball BRB

A category of pitches that includes curveballs, sliders, and other pitches with significant lateral movement.

Breaking Ball Strike BRBS

The number of Breaking Ball strikes thrown.

Breaking Ball Strike% BRB%

The percentage of Breaking Ball strikes, out of the total Breaking Balls thrown.

Center Mass %

Measures how often pitches are thrown into the center of the strike zone. While throwing strikes is important, consistently hitting the center of the zone may increase the likelihood of hard contact. Lower percentages generally indicate better pitch location.

Changeup CH

A type of pitch that is thrown with the intent of deceiving the batter through a slower speed and differing movement.

Changeup Strike CHS

The number of Changeup strikes thrown.

Changeup Strike% CH%

The percentage of Changeup strikes, out of the total Changeups thrown.

Curveball CB

A breaking pitch with significant vertical drop and "looping" action.

Curveball Strike CBS

The number of Curveball strikes thrown.

Curveball Strike% CB%

The percentage of Curveball strikes out of the total Curveballs thrown.

Cutter CT

A "cut fastball" thrown with late, sharp horizontal movement away from the pitcher's arm side.

Cutter Strike CTS

The number of Cutter strikes thrown.

Cutter Strike% CT%

The percentage of Cutter strikes out of the total Cutters thrown.

Drop DR

A pitch with heavy topspin that dives downward as it approaches the hitting zone.

Drop Strike DRS

The number of Drop strikes thrown.

Drop Strike% DR%

The percentage of Drop strikes out of the total Drop balls thrown.

Earned Run Avg ERA

A pitcher's average number of earned runs given up per nine innings pitched, indicating their effectiveness in preventing runs.

Earned Runs Allowed ER

The number of runs a pitcher allows that are considered earned, reflecting their performance in preventing opposing teams from scoring.

Fastball FB

A type of pitch thrown with maximum velocity and backspin, generally used to overpower hitters.

Fastball Strike FBS

The number of Fastball strikes thrown.

Fastball Strike% FB%

The percentage of Fastball strikes, out of the total Fastballs thrown.

Fatigue Score

Estimates a pitcher's workload based on pitch count, pitches per inning, and recent usage. Higher scores indicate increased fatigue and may suggest it's time to rest or make a pitching change.

First Pitch Strike FPS

The number of times a pitcher successfully throws a first-pitch strike to a batter.

First Pitch Strike% FPS%

The percentage of first-pitch strikes, out of the total first pitches thrown.

Flyball% FLB%

The percentage of batted balls that are fly balls, which tend to result in pop-ups or long flyouts.

Groundball% GB%

The percentage of batted balls that are ground balls, which are more likely to result in groundouts or base hits.

Hit Batter HBP

The number of batters a pitcher hits with a pitch. This is also known as Hit by Pitch.

Hits H

The number of times a batter successfully makes contact with the pitch and reaches base safely and without an error.

Hits per 9 Innings H/9

This statistic measures the average number of hits a pitcher allows per nine innings pitched. H/9 is an indicator of a pitcher's ability to limit base hits by opposing batters.

Innings Pitched IP

The total number of innings a pitcher has played in a game or over a specific time period.

Knuckleball KN

A pitch thrown with very little spin, causing the ball to move erratically due to air resistance.

Knuckleball Strike KNS

The number of Knuckleball strikes thrown.

Knuckleball Strike% KN%

The percentage of Knuckleball strikes out of the total Knuckleballs thrown.

Line Drive% LD%

The percentage of batted balls that are line drives, which are often associated with hard-hit balls.

Opposing Team Batting Avg BAA

The average batting performance of the opposing team against a particular pitcher, indicating how well the pitcher is limiting hits.

Pitches by Inning PBI

Pitches by inning in baseball refer to the number of pitches thrown by a pitcher in each inning of a game. It's a statistic used to track a pitcher's workload, efficiency, and endurance throughout the game.

Pitches Per Inning P/IP

The average number of pitches a pitcher throws in a single inning, reflecting their efficiency and stamina.

Rise RI

Primarily used in fastpitch softball; a pitch with backspin that causes it to move upward through the zone.

Rise Strike RIS

The number of Rise strikes thrown.

Rise Strike% RI%

The percentage of Rise strikes out of the total Rise balls thrown.

Screwball SC

A breaking pitch that moves toward the pitcher's arm side (opposite of a curveball).

Screwball Strike SCS

The number of Screwball strikes thrown.

Screwball Strike% SC%

The percentage of Screwball strikes out of the total Screwballs thrown.

Sinker SN

A fastball variant with significant downward movement designed to induce groundballs.

Sinker Strike SNS

The number of Sinker strikes thrown.

Sinker Strike% SN%

The percentage of Sinker strikes out of the total Sinkers thrown.

Slider SLD

A breaking pitch thrown with higher velocity than a curveball, featuring sharp, lateral break.

Slider Strike SLDS

The number of Slider strikes thrown.

Slider Strike% SLD%

The percentage of Slider strikes out of the total Sliders thrown.

Splitter SP

A pitch that appears to be a fastball but drops sharply near the plate due to the pitcher's finger spread.

Splitter Strike SPS

The number of Splitter strikes thrown.

Splitter Strike% SP%

The percentage of Splitter strikes out of the total Splitters thrown.

Strike % ST%

The percentage of pitches thrown that are strikes, indicating a pitcher's control and ability to locate pitches in the strike zone.

Strike Looking SL

Refers to a called strike by the umpire without the batter swinging at the pitched ball.

Strike Looking % SL%

The percentage of total strikes recorded, where the batter didn't swing at the pitched ball but was called a strike by the umpire.

Strike Swinging SS

Refers to a strike that occurs when the batter swings at a pitched ball and misses.

Strike Swinging % SS%

The percentage of total strikes recorded, that result from a batter swinging at the pitched ball and missing.

Strikeout to Walk Ratio K/BB

K/BB is a pitcher's ratio of strikeouts (K) to walks (BB), indicating their control and performance, with a higher ratio signifying better pitching.

Strikeouts K

The number of batters a pitcher retires by throwing three strikes to each batter, resulting in an out.

Strikeouts per 9 Innings K/9

A statistical measure indicating the average number of strikeouts a pitcher achieves per nine innings pitched. It's a measure of a pitcher's ability to strike out opposing batters.

Strikes ST

The number of pitches thrown that are within the strike zone and are considered strikes.

Total Pitches TP

The overall count of pitches thrown by a pitcher in a game or during a specific period.

Walks BB

A walk is when a batter reaches first base after four balls are pitched outside the strike zone.

Walks & Hits Per Inning WHIP

A statistic that calculates the average number of walks and hits a pitcher allows per inning, measuring their overall effectiveness.

Walks per 9 Innings BB/9

This statistic measures the average number of walks a pitcher allows per nine innings pitched. BB/9 is an indicator of a pitcher's control and ability to avoid giving free passes to opposing batters.

Walks Per Inning BB/IP

The number of walks a pitcher allows per inning, indicating their control and ability to avoid free bases.

Whiff %

The percentage of swings that miss the baseball. A higher Whiff % generally indicates pitches that are more difficult for hitters to make contact with.

Zone %

Measures how often pitches are located within the strike zone. A higher Zone % reflects better ability to consistently throw strikes.