William Kempner
Miami Marlins- Age
- 25
- Born
- June 18, 2001 · San Jose, CA, USA
- Height / weight
- 6' 0", 222 lb
- Bats / throws
- Right / Right
- MLB debut
- May 5, 2026
2026 pitching
- W-L
- 1-0
- ERA
- 2.92
- SO
- 14
- WHIP
- 0.97
- IP
- 12.1
- SV
- 0
2026 game log (pitching)
| Date | Opp | Result | IP | H | R | ER | BB | SO | HR | ERA |
|---|---|---|---|---|---|---|---|---|---|---|
| 7/11 | vs CLE | L | 2.0 | 3 | 2 | 2 | 0 | 3 | 0 | 2.92 |
| 7/9 | vs SEA | W | 0.1 | 2 | 2 | 2 | 2 | 0 | 1 | 1.74 |
| 7/3 | @ ATH | W | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 0.00 |
| 6/15 | @ PHI | L | 2.1 | 0 | 0 | 0 | 0 | 2 | 0 | 0.00 |
| 6/10 | vs AZ | W | 2.0 | 0 | 0 | 0 | 2 | 3 | 0 | 0.00 |
| 6/5 | vs TB | L | 1.1 | 1 | 0 | 0 | 0 | 1 | 0 | 0.00 |
| 5/31 | @ NYM | L | 1.1 | 2 | 0 | 0 | 0 | 3 | 0 | 0.00 |
| 5/30 | @ NYM | L | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.00 |
| 5/5 | vs BAL | L | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 0.00 |
ERA is the season ERA after that game.
Career pitching
| Season | Team | W | L | ERA | G | GS | SV | IP | H | ER | HR | BB | SO | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | MIA | 1 | 0 | 2.92 | 9 | 0 | 0 | 12.1 | 8 | 4 | 1 | 4 | 14 | 0.97 |
| Career | 1 | 0 | 2.92 | 9 | 0 | 0 | 12.1 | 8 | 4 | 1 | 4 | 14 | 0.97 |
Regular season.
Stats from the MLB Stats API.