Pitchers No. 1745
William Kempner
Reliever · 25 · AAA · Marlins
Triple-A
- IP
- 31.2
- ERA
- 3.98
- FIP
- 3.38
- WHIP
- 1.29
- K%
- 37.4%
- BB%
- 15.1%
- K−BB
- 22.3%
- HR
- 3
- GS
- 0
- Pitches
- 584
- Strike%
- 60.6%
- GB%
- 29.3%
- FB mph
- 95.1
- Zone%
- 44.7%
Strike% is strikes out of every pitch. GB% is ground outs out of balls in play. Fastball and Zone% are there only when the park tracks the pitch. Zone% is the share thrown in the strike zone.
Pitches
4-Seam
48.2% · 192
95.5 mph · +11.7 in rise · 16.5 in arm-side
2,395 rpm · 6.2 ft ext · Zone 44.8% · Chase 28.3% · Whiff 36.6%
Sweeper
22.1% · 88
81.6 mph · +5.2 in rise · 16.1 in glove-side
2,906 rpm · 6.2 ft ext · Zone 47.7% · Chase 43.5% · Whiff 28.6%
Sinker
14.6% · 58
94.0 mph · +3.7 in rise · 19.7 in arm-side
2,252 rpm · 6.2 ft ext · Zone 31.0% · Chase 30.0% · Whiff 9.1%
Cutter
12.6% · 50
87.3 mph · +5.3 in rise · 1.6 in glove-side
2,623 rpm · 6.2 ft ext · Zone 56.0% · Chase 18.2%
Only pitches a park tracked. Rise and arm-side run are in inches. Whiff% is misses out of swings. Chase% is swings at pitches outside the strike zone.
Level Wins
+0.3
This season at Triple-A, against the 1990–2025 average. Major-league time is not included. This is not a major-league WAR.
bWAR
Career
+0.2
2026
+0.2
bWAR is Baseball-Reference’s wins above replacement, not a 40 Man stat. The numbers come from their daily WAR file, which they allow anyone to reuse with a citation and a link. Pace stretches a short year up to 600 plate appearances, or to 180 innings for a starter and 65 for a reliever. A year that already reached that playing time keeps the bWAR he earned, so extra at-bats do not shrink it. It shows once a year reaches 100 plate appearances or 30 innings. File dated 2026-11-07. This player on Baseball-Reference · How bWAR is calculated.
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