GB EV / GB EV
Batter
Average exit velocity in mph on ground balls, bunts excluded. This is a velocity, not ground-ball rate — Savant publishes it under the bare name 'gb'.
Agreement with Savant
Checked nightly. Agreement tolerance: ±0.
Pitcher
Average exit velocity allowed in mph on ground balls, bunts excluded. This is a velocity, not ground-ball rate — Savant publishes it under the bare name 'gb'.
Agreement with Savant
Checked nightly. Agreement tolerance: ±0.
Shown for: batter and pitcher.
Formula
sum(gb_ev_sum) / NULLIF(sum(gb_n), 0) — mean exit velocity on non-bunt ground balls. A velocity, not a ground-ball rate.
Inputs
pitches.launch_speedplate_appearances.gb_ev_sumplate_appearances.gb_n
Era caveats
Bunts are excluded
Every exit-velocity figure excludes bunts, matching Savant's hfFlag=is..bunt search flag. That flag reproduces Savant's published exit velocity exactly; velocity cutoffs and the sac_bunt column do not. (runbook §16)
Three tracking systems across the seasons shown
Rows carry a tracking_era of trackman, hawkeye or hawkeye_bat (migration 001). The systems differ in what they measure and how precisely, so long spans cross a measurement boundary as well as a rule one.
Version history
- 2026-08-31 — Added with the spine slice, alongside fbld_ev. Savant's column is named gb, which reads as ground-ball rate and is not one. (runbook §51)