William Kempner
William McCullough Kempner
Born: June 18, 2001
San Jose, CA US
Primary Position: Pitcher
Bats: Right
Throws: Right
Height: 6'0"
Weight: 222
Career: 2022-2025
William Kempner compiled a career record of 12 wins and 8 losses and a 3.21 ERA in his 95-game pitching career with the San Jose Giants, Giants Black, Eugene Emeralds, Richmond Flying Squirrels, Scottsdale Scorpions, Beloit Sky Carp, Pensacola Blue Wahoos and Jacksonville Jumbo Shrimp. He began playing during the 2022 season and last took the field during the 2025 campaign.
 San Jose Giants |
 Giants Black |
 Eugene Emeralds |
 Richmond Flying Squirrels |
 Scottsdale Scorpions |
 Beloit Sky Carp |
 Pensacola Blue Wahoos |
 Jacksonville Jumbo Shrimp |
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Pitching:
| Year | Level | Lg | Team | W | L | W% | ERA | G | GS | GF | CG | SHO | SV | IP | H | R | ER | HR | BB | IBB | SO | HBP | BK | WP | BF |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | A | CALL | San Jose Giants | 0 | 0 | 6.35 | 3 | 2 | 0 | 0 | 0 | 0 | 5.7 | 6 | 4 | 4 | 1 | 4 | 0 | 6 | 2 | 0 | 0 | 28 | |
| 2022 | R | AZCL | Giants Black | 1 | 0 | 1.000 | 2.70 | 2 | 0 | 0 | 0 | 0 | 0 | 3.3 | 4 | 1 | 1 | 0 | 2 | 0 | 5 | 0 | 0 | 3 | 15 |
| 2023 | A | CALL | San Jose Giants | 1 | 3 | .250 | 4.67 | 14 | 5 | 4 | 0 | 0 | 1 | 27.0 | 21 | 18 | 14 | 0 | 15 | 0 | 29 | 5 | 0 | 2 | 124 |
| 2023 | Advanced A | NORW | Eugene Emeralds | 3 | 2 | .600 | 2.91 | 23 | 0 | 9 | 0 | 0 | 0 | 34.0 | 28 | 15 | 11 | 5 | 13 | 0 | 47 | 5 | 0 | 5 | 144 |
| 2023 | AA | EL | Richmond Flying Squirrels | 0 | 0 | 5.40 | 1 | 0 | 0 | 0 | 0 | 0 | 1.7 | 3 | 1 | 1 | 0 | 2 | 0 | 2 | 0 | 0 | 0 | 10 | |
| 2024 | Fall | AZFL | Scottsdale Scorpions | 0 | 0 | 7.36 | 4 | 0 | 1 | 0 | 0 | 0 | 3.7 | 2 | 3 | 3 | 0 | 3 | 0 | 7 | 0 | 0 | 2 | 16 | |
| 2025 | Advanced A | MIDW | Beloit Sky Carp | 1 | 2 | .333 | 3.04 | 19 | 0 | 12 | 0 | 0 | 6 | 26.7 | 19 | 11 | 9 | 0 | 10 | 0 | 39 | 3 | 1 | 2 | 111 |
| 2025 | AAA | IL | Jacksonville Jumbo Shrimp | 3 | 0 | 1.000 | 2.65 | 13 | 0 | 2 | 0 | 0 | 1 | 17.0 | 8 | 5 | 5 | 2 | 15 | 0 | 25 | 3 | 0 | 1 | 76 |
| 2025 | AA | SOUL | Pensacola Blue Wahoos | 3 | 1 | .750 | 1.12 | 16 | 0 | 6 | 0 | 0 | 0 | 24.0 | 11 | 4 | 3 | 0 | 15 | 0 | 31 | 2 | 0 | 1 | 96 |
| Totals | 12 | 8 | .600 | 3.21 | 95 | 7 | 34 | 0 | 0 | 8 | 143.0 | 102 | 62 | 51 | 8 | 79 | 0 | 191 | 20 | 1 | 16 | 620 |
Fielding:
| Year | Level | Lg | Team | Pos | GP | PO | A | E | DP | Fld% | RF/G |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | A | CALL | San Jose Giants | P | 3 | 1 | 0 | 0 | 1 | 1.000 | .333 |
| 2022 | R | AZCL | Giants Black | P | 2 | 0 | 0 | 0 | 0 | .000 | |
| 2023 | Advanced A | NORW | Eugene Emeralds | P | 23 | 3 | 1 | 1 | 0 | .800 | .174 |
| 2023 | A | CALL | San Jose Giants | P | 14 | 1 | 8 | 0 | 1 | 1.000 | .643 |
| 2023 | AA | EL | Richmond Flying Squirrels | P | 1 | 0 | 0 | 0 | 0 | .000 | |
| 2024 | Fall | AZFL | Scottsdale Scorpions | P | 4 | 0 | 0 | 0 | 0 | .000 | |
| 2025 | Advanced A | MIDW | Beloit Sky Carp | P | 19 | 0 | 0 | 2 | 0 | .000 | .000 |
| 2025 | AA | SOUL | Pensacola Blue Wahoos | P | 16 | 2 | 2 | 0 | 0 | 1.000 | .250 |
| 2025 | AAA | IL | Jacksonville Jumbo Shrimp | P | 13 | 1 | 2 | 0 | 0 | 1.000 | .231 |
| Totals | 90 | 7 | 13 | 3 | 1 | .870 | .222 |
Minor League Service:
| Year | Level | League | Team | Affiliation | First Appearance | Final Appearance |
|---|---|---|---|---|---|---|
| 2022 | R | Arizona Complex League | Giants Black | SFN | August 18, 2022 | August 22, 2022 |
| 2022 | A | California League | San Jose Giants | SFN | September 1, 2022 | September 11, 2022 |
| 2023 | A | California League | San Jose Giants | SFN | April 8, 2023 | June 11, 2023 |
| 2023 | Advanced A | Northwest League | Eugene Emeralds | SFN | June 14, 2023 | September 8, 2023 |
| 2023 | AA | Eastern League | Richmond Flying Squirrels | SFN | September 16, 2023 | September 16, 2023 |
| 2024 | Fall | Arizona Fall League | Scottsdale Scorpions | October 11, 2024 | November 11, 2024 | |
| 2025 | Advanced A | Midwest League | Beloit Sky Carp | MIA | April 5, 2025 | June 7, 2025 |
| 2025 | AA | Southern League | Pensacola Blue Wahoos | MIA | June 12, 2025 | August 9, 2025 |
| 2025 | AAA | International League | Jacksonville Jumbo Shrimp | MIA | August 12, 2025 | September 21, 2025 |
Persons data from the Chadwick Baseball Bureau are Copyright Chadwick Baseball Bureau, and are made available under the Open Data Commons Attribution License.
