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MLBPlayer profile/KC
RP#36KCAdvanced data
Aaron Bummer
Relief pitcher
6' 3" · 215 lbs · 32 yo
Form Line · next game · as of Aug 6
0.7K▲ +0vs pace (0.7)
typical range (~68%) 0–1 · on 20 games
ER1.1+0.3
The One's forward projection vs the player's own season pace — not a grade, not accuracy-tested. What is Form Line?
Live · vs MIN
Minnesota Twins
MIN @ KC
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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
21 G · 0 GS · 16.2 IP
Run prevention
ERA10.26
5.502.50
FIP9.09
5.003.00
xFIP5.95
5.003.00
WHIP2.10
1.551.00
Stuff & control
K/97.0
6.012.0
BB/95.9
4.52.0
HR/93.78
1.600.70
K%14.8%
18.0%30.0%
BB%12.5%
11.0%5.0%
Quality of contact
BABIP—
.270.330
GO/AO0.95
0.801.60
Pitch mix
Arsenal
2026 · 250 pitches
PitchUseWhiffRV/100
- Sinker39%12%-2.5
- Curveball21%18%-5.8
- Sweeper21%37%-2.4
RV/100 is pitcher-side — negative is a pitch that saved runs.
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