Baseball statistics glossary
Plain-English definitions for every stat, pitch type, at-bat result and signal on bsbl.io, with formulas and the ranges that separate poor from elite.
Every term
- AVG
- OBP
- SLG
- OPS
- ISO
- BABIP
- BB%
- K%
- BB
- IBB
- H
- HR
- RBI
- R
- SB
- CS
- PA
- AB
- TB
- HBP
- BB
- 2B
- 3B
- G
- XBH
- GIDP
- AB/HR
- BB/K
- R
- RA
- PCT
- GB
- RDiff
- W–L
- Strk
- L10
- WCGB
- Magic
- Elim
- Clinched
- Seed
- wOBA
- xwOBA
- xBA
- xSLG
- wRC+
- OPS+
- WAR
- wOBA/con
- wOBA − xwOBA
- ERA
- WHIP
- IP
- W
- L
- SV
- HLD
- K/9
- BB/9
- K%
- BB%
- FIP
- xFIP
- SIERA
- xERA
- xwOBA against
- K-BB%
- LOB%
- HR/FB
- ERA − FIP
- RV/100
- Stuff
- RE/pitch
- EV
- LA
- Barrel%
- Hard-Hit%
- Sweet-Spot%
- Sprint speed
- Whiff%
- SwStr%
- CSW%
- Chase%
- Spin
- IVB
- HB
- Velo
- Bat speed
- PO
- A
- FLD%
- OAA
- DRS
- Framing
- Pop time
- Exchange
- Arm strength
- 20–80 scale
- Hit
- Pwr
- Eye
- Run
- Stf
- Cmd
- Ctl
- Con
- Prospect score
- Age-adj
- Park HR factor
- Park runs factor
- Doubles effect
- Triples effect
- Run environment
- Park volatility
- Sector factor
- Park DNA
- Reliability
- Leverage Index
- WPA
- TTOP
- BvP
- RISP
- Matchup Score
- Platoon xwOBA
- Forecast OPS (14d)
- Forecast ERA (14d)
- EV Δ
- Process
- IL-10 / IL-15 / IL-60
- Min PA
- High leverage
- Low leverage
- Swing%
- Contact%
- Zone%
- Putaway%
- Usage%
- Dist
- Z-Swing%
- Z-Contact%
- Swing RV
- Take RV
- Chase RV
- GB%
- FB%
- LD%
- PU%
- BIP
- Hit%
- EV against
- Barrel% against
- Hard-Hit% against
- Max velo
- Max EV
- Barrels/PA
- BA − xBA
- F-Strike%
- ER
- SO
- BSv
- SVO
- BF
- P
- GS
- QS
- CG
- SHO
- H/9
- HR/9
- K/BB
- R
- H
- E
- vs LHP
- vs RHP
- vs LHH
- vs RHH
- Gap (L−R)
- WPA/PA
- Clutch
- Proj R
- Proj wOBA
- SB%
- Extension
- Perceived velo
- Ball
- Ball in dirt
- Called strike
- Swinging strike
- Foul
- Foul tip
- Foul bunt
- Missed bunt
- In play
- Pitchout
- FF
- SI
- FC
- SL
- ST
- SV
- CU
- KC
- CH
- FS
- KN
- EP
- 1B
- 2B
- 3B
- HR
- BB
- IBB
- HBP
- K
- KDP
- OUT
- FO
- FC
- FC
- GIDP
- DP
- TP
- SF
- SFDP
- SAC
- SACDP
- E
- CI
- FI
- Velocity decline
- Velocity gain
- Arm fatigue
- Contact quality
- Plate discipline
- Hot streak
- Cold streak
- Arsenal change
- Pitch shape shift
- Breakout
- Command loss
- Slump
- Fatigue