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William Kempner

Ranked Prospect Active on MLB Roster ... Miami Marlins
High Level
MLB
Years
2020-2026 (2026-2026)
Proper Name
William McCullough Kempner
Positions
P (91)
Height / Weight
6-0 / 222
Bats / Throws
Right / Right
Birthdate
June 18,2001   Age:  24.354
Place
San Jose, California
High School
Valley Christian (San Jose,CA)
Colleges
Gonzaga University (Spokane,WA)
Drafted/Signed
2022-3-106-San Francisco Giants
Signing Bonus
$ 525,000
MLB Debut
May 5,2026
MLBAM ID
687531
Retrosheet#
kempw001
Actions
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William Kempner
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MLB Pitching Logs

2026


Minor League Pitching Logs

2022 2023 2025 2026


MLB Pitching Splits

2026 Career