WILLIAM
KEMPNER
P
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Status
On roster
Ht/Wt
6’0’’,
222 lbs
Bats/Throws
R /
R
Experience
0
years
(Rookie)
Born
Jun 18, 2001
(24 yrs)
San Jose, California
Drafted
Drafted by San Francisco in 2022 (3/106).
Acquired
Acquired in a trade with San Francisco in 2025.
Season Stats
| Pitcher | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| W Wins
|
L Losses
|
ERA Earned Run Average
|
G Games
|
GS Games Started
|
CG Complete Games
|
SHO Shutouts
|
SV Saves
|
HLD Holds
|
IP Innings Pitched
|
H Hits Allowed
|
R Runs Allowed
|
ER Earned Runs
|
HR Home Runs Allowed
|
BB Walks
|
SO Strikeouts
|
WHIP Walks and Hits Per Inning Pitched
|
|
Transactions & Injuries
| Date | Description | |
|---|---|---|
| 2025-11-18 |
Contract purchased from Jacksonville (AAA).
|
|
| 2025-01-15 |
Acquired from the San Francisco Giants.
|
The Miami Marlins acquired pitcher William Kempner from the San Francisco Giants for international bonus pool money. |
| 2022-07-28 |
Signed by the San Francisco Giants.
|
News
View More >
Rotowire
Tue, Nov 18, 2025 at 6:25 PM
The Marlins selected Kempner's contract from Triple-A Jacksonville on Tuesday.
