## FanGraphs Library Stat Glossary

*To find a particular statistic, use Ctr-F and type in the abbreviation or stat name that you are looking for.*

**Offense:**

OBP – On-Base Percentage

OPS – On-base Plus Slugging

OPS+ – On-base Plus Slugging Plus

wOBA – Weighted On-Base Average

wRAA – Weighted Runs Above Average

UBR – Ultimate Base Running

wRC – Weighted Runs Created

wRC+ – Weighted Runs Created Plus

BABIP – Batting Average on Ball In Play

ISO – Isolated Power

HR/FB – Home Runs per Fly Ball rate

Spd – Speed Score

GB% – Ground ball percentage

FB% – Fly ball percentage

LD% – Line drive percentate

K% – Stikeout rate

BB% – Walk rate

O-Swing% – Outside-the-zone swing rate

Z-Swing% – Inside-the-zone swing rate

Swing% – Swing rate

O-Contact% – Outside-the-zone contact percentage

Z-Contact% – Inside-the-zone contact percentage

Contact% – Contact percentage

Zone% – Percentage of pitches within the zone

F-Strike% – First-pitch strike percentage

SwStr% – Swinging Stike percentage

wFB – Fastball runs above average

wSL – Slider runs above average

wCT – Cutter runs above average

wCB – Curveball runs above average

wCH – Change-up runs above average

wSF – Split-finger fastball runs above average

wKN – Knuckleball runs above average

wFB/C – Fastball runs above average per 100 pitches

wSL/C– Slider runs above average per 100 pitches

wCT/C – Cutter runs above average per 100 pitches

wCB/C – Curveball runs above average per 100 pitches

wCH/C – Change-up runs above average per 100 pitches

wSF/C – Slit-fingered fastball runs above average per 100 pitches

wKN/C – Knuckleball runs above average per 100 pitches

**Defense:**

rSB – Stolen Base Runs Saved runs above average

rGDP – Double Play Runs Saved runs above average

rARM – Outfield Arms Runs Saved runs above average

rGFP – Good Fielding Plays Runs Saved runs above average

rPM – Plus/Minus Runs Saved runs above average

DRS – Defensive Runs Saved runs above average

BIZ – Balls In Zone

OOZ – Balls Out Of Zone

RZR – Revised Zone Rating

CPP – Expected Catcher Passed Pitches

RPP – Catcher Blocked Pitches in runs above average

TZ – Total Zone

TZL – Total Zone with Location data

FSR – Fan Scouting Report

ARM – Outfield Arm runs above average

DPR – Double Play runs above average

RngR – Range runs above average

ErrR – Error runs above average

UZR – Ultimate Zone Rating

UZR/150 – Ultimate Zone Rating per 150 defensive games

**Pitching:**

ERA – Earned Run Average

WHIP – Walks and Hits per Innings Pitched

FIP – Fielding Independent Pitching

xFIP – Expected Fielding Independent Pitching

SIERA – Skill-Interactive ERA

tERA – True Runs Allowed

K/9 – Strikeout rate

BB/9 – Walk rate

K% – Strikeout percentage

BB% – Walk percentage

K/BB – Strikeout-to-Walk ratio

LD% – Line drive rate

GB% – Ground ball rate

FB% – Fly ball rate

HR/FB – Home runs per fly ball rate

BABIP – Batting Average on Balls In Play

LOB% – Left On Base percentage

ERA- – ERA Minus

FIP- FIP Minus

xFIP- – xFIP Minus

SD – Shutdowns

MD – Meltdowns

O-Swing% – Outside-the-zone swing rate

Z-Swing% – Inside-the-zone swing rate

Swing% – Swing rate

O-Contact% – Outside-the-zone contact percentage

Z-Contact% – Inside-the-zone contact percentage

Contact% – Contact percentage

Zone% – Percentage of pitches within the zone

F-Strike% – First-pitch strike percentage

SwStr% – Swinging Stike percentage

wFB – Fastball runs above average

wSL – Slider runs above average

wCT – Cutter runs above average

wCB – Curveball runs above average

wCH – Change-up runs above average

wSF – Split-finger fastball runs above average

wKN – Knuckleball runs above average

wFB/C – Fastball runs above average per 100 pitches

wSL/C– Slider runs above average per 100 pitches

wCT/C – Cutter runs above average per 100 pitches

wCB/C – Curveball runs above average per 100 pitches

wCH/C – Change-up runs above average per 100 pitches

wSF/C – Slit-fingered fastball runs above average per 100 pitches

wKN/C – Knuckleball runs above average per 100 pitches

**Win Probability:**

WPA – Win Probability Added

-WPA – Loss Advancement

+WPA – Win Advancement

RE24 – Run Above Average based on the 24 Base/Out States

REW – Wins Above Average based on the 24 Base/Out States

pLI – A player’s average LI for all game events

phLI – A batter’s average LI in only pinch hit events

PH – Pinch Hit Opportunities

gmLI – A pitcher’s average LI when he enters the game

inLI – A pitcher’s average LI at the start of each inning

exLI – A pitcher’s average LI when exiting the game

WPA/LI – Situational Wins

Clutch – How much better or worse a player does in high leverage situations than he would have done in a context neutral environment

**WAR**

*Offensive*

Batting – Park Adjusted Runs Above Average based on wOBA

Base Running – Base running runs above average, includes SB or CS

Fielding – Fielding Runs Above Average based on UZR (TZ before 2002)

Replacement – Replacement Runs set at 20 runs per 600 plate apperances

Positional – Positional Adjustment set at +12.5 for C, +7.5 for SS, +2.5 for 2B/3B/CF, -7.5 for RF/LF, -12.5 for 1B, -17.5 for DH

Fld + Pos

RAR – Runs Above Replacement (Batting + Fielding + Base Running + Replacement + Positional)

WAR – Wins Above Replacement

*Pitching*

RA9-Wins – Wins Above Replacement calculated using Runs Allowed

BIP-Wins – BABIP wins above average

LOB-Wins – Sequencing in wins above average (calculated as the difference between RA9-Wins and WAR minus BIP-Wins)

FDP-Wins – BABIP and Sequencing wins above average, also the difference between RA9-Wins and WAR

RAR – Runs Above Replacement

WAR – Wins Above Replacement

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