Spencer Bivens

Spencer Bivens (born June 28, 1994) is an American professional baseball pitcher for the San Francisco Giants of Major League Baseball (MLB). He made his MLB debut in 2024.

Amateur career Bivens played high school baseball at State College Area High School in his hometown of State College, Pennsylvania. After graduating, Bivens enrolled in Louisburg College, pitching to a 3.14 ERA as a sophomore in 2014. Before he could pitch for their baseball team, he failed a drug test, causing him to lose his spot on the team.

Bivens later signed with the Steel City Slammin' Sammies of the newly–formed Washington League. In 6 games (3 starts), he posted a 3–2 record and 3.74 ERA with 19 strikeouts across innings pitched.

Washington Wild Things On October 13, 2020, Bivens signed with the Washington Wild Things of the Frontier League. In nine appearances for Washington, he struggled to a 7.24 ERA with 10 strikeouts across innings pitched. On July 7, 2021, Bivens was released by the Wild Things.

West Virginia Power On July 8, 2021, Bivens signed with the West Virginia Power of the Atlantic League of Professional Baseball. In three contests, he posted a 10.50 ERA with seven strikeouts across six innings of work.

Gastonia Honey Hunters On July 19, 2021, Bivens was traded to the Gastonia Honey Hunters of the Atlantic League of Professional Baseball in exchange for Alexis Candelario. In 14 starts for Gastonia, he compiled a 4–8 record and 7.26 ERA with 62 strikeouts across innings pitched. In 2022, Bivens made three scoreless appearances for the Honey Hunters, striking out nine across innings.

San Francisco Giants On May 25, 2022, Bivens signed a minor league contract with the San Francisco Giants organization. He split the remainder of the season between the Single–A San Jose Giants and Triple–A Sacramento River Cats. In 27 appearances for the two affiliates, Bivens accumulated a 3.95 ERA with 48 strikeouts across innings.

Bivens began the 2023 season with the High–A Eugene Emeralds, and was promoted to the Double–A Richmond Flying Squirrels after six games. In 27 appearances for Richmond, he registered a 5–4 record and 3.69 ERA with 72 strikeouts across 78 innings pitched.

Bivens was invited to major league spring training in 2024. He began the year with Triple–A Sacramento, recording a 2.81 ERA with 36 strikeouts and 8 saves across 21 games. Bivens was named the Pacific Coast League pitcher of the month for the month of May.

On June 16, 2024, Bivens was selected to the 40-man roster and promoted to the major leagues for the first time. In his debut later that day, he earned his first career win, going 3 innings, striking out 4 and allowing one hit, a home run by Nolan Schanuel. Bivens completed the 2024 season with a 3–1 record, 1 save, a 3.14 ERA, and 37 strikeouts across innings, having appeared in 27 games.

Bivens made the Giants' Opening Day roster in 2025. Over 54 appearances for the team, he compiled a 4-3 record and 4.00 ERA in 81 innings, recording three saves and 61 strikeouts.