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MLBPlayer profile/BOS
RP#57BOSAdvanced data
Greg Weissert
Relief pitcher
6' 2" · 235 lbs · 31 yo
Form Line · next game · as of Jul 31
0.9K▲ +0vs pace (0.9)
typical range (~68%) 0–2 · on 44 games
ER0.4+0
The One's forward projection vs the player's own season pace — not a grade, not accuracy-tested. What is Form Line?
Today · @ LAD
Los Angeles Dodgers
BOS @ LAD
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Statcast fingerprint
Greg Weissert
MLB percentile · n=406
- xwOBA72
- xBA66
- xSLG64
- Barrel %88
- Hard-hit %87
- Exit velo90
- Whiff %28
- Chase %84
- K %49
- BB %78
Strong exit-velo suppression (90th pct) — whiff rate (28th pct) the soft spot.
Statcast · 2026 season
The advanced layer
Expected stats, sabermetric context, and rate metrics straight from the MLB Stats API. Each bar is calibrated against league benchmark ranges, not season percentiles — so the position is stable even on a small sample.
PITCHING
Run prevention
45 G · 0 GS · 43.1 IP
Run prevention
ERA3.95
5.502.50
FIP4.28
5.003.00
xFIP3.94
5.003.00
WHIP1.20
1.551.00
Stuff & control
K/98.5
6.012.0
BB/92.5
4.52.0
HR/91.45
1.600.70
K%22.7%
18.0%30.0%
BB%6.6%
11.0%5.0%
Quality of contact
BABIP—
.270.330
GO/AO0.89
0.801.60
Pitch mix
Arsenal
2026 · 617 pitches
PitchUseWhiffRV/100
- Sinker37%13%+2.2
- 4-Seam Fastball29%24%+0.2
- Sweeper15%39%+0.1
- Changeup10%36%-2.2
RV/100 is pitcher-side — negative is a pitch that saved runs.
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