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: 24.353

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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2022

Bowman

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