Miami Marlins
#71
William Kempner
William Kempner is a right-handed pitcher for the Miami Marlins. In 2026, Kempner has posted a - ERA with 0 strikeouts in 0 innings pitched. William made his MLB debut on May 5, 2026 and was born in San Jose, USA.
William Kempner — 2026 Pitching Stats
-
ERA
---
W-L
-
SO
-
WHIP
-
IP
-
FIP
-
xFIP
-
SIERA
-
K/9
-
BB/9
-
WAR
-
G
-
GS
-
SV
-
H
-
HR
-
BB
William Kempner — 2026 Statcast Data
90.9
Avg Velocity
98.4
Max Velocity
2485
Avg Spin (RPM)
48
Total Pitches
William Kempner — 2026 Pitch Arsenal
William Kempner — Career Pitching Stats
| Year | Team | W | L | ERA | G | GS | SV | IP | SO | BB | WHIP | FIP | WAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | - | - | - | - | - | - | - | - | - | - | - | - | - |
