Colin Holderman

Colin Scott Holderman (born October 8, 1995) is an American professional baseball pitcher for the Cleveland Guardians of Major League Baseball (MLB). He has previously played in MLB for the New York Mets and Pittsburgh Pirates.

Amateur career Holderman graduated from Bradley-Bourbonnais Community High School in Bradley, Illinois, in 2014. He enrolled at Southern Illinois University to play college baseball for the Southern Illinois Salukis. After one year, he transferred to Heartland Community College. Holderman committed to transfer to Mississippi State University after one year at Heartland. He began his professional career with the Kingsport Mets of the Rookie-level Appalachian League. but underwent Tommy John surgery on April 4, 2018. He missed the 2018 season while recovering from the surgery.

Holderman returned to action in 2019 with the Low-A Brooklyn Cyclones, Columbia, and the High-A St. Lucie Mets. In 16 appearances (15 starts) split between the three affiliates, he posted a cumulative 4–2 record and 3.53 ERA with 49 strikeouts across innings pitched. Holderman did not play in a game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic.

In 2021, Holderman pitched for the Binghamton Rumble Ponies of the Double-A Eastern League. He had a 3.38 earned run average and served as Binghamton's closer. Assigned to the Arizona Fall League after the regular season, he had a 8.71 earned run average during 11 games and the Mets opted not to add him to their 40-man roster to protect him from the Rule 5 draft. He made his major league debut that afternoon at Citi Field and pitched a scoreless ninth inning against the Seattle Mariners.

Pittsburgh Pirates On July 22, 2022, the Mets traded Holderman to the Pittsburgh Pirates in exchange for Daniel Vogelbach. The Pirates subsequently assigned him to the Triple-A Indianapolis Indians and promoted him to the major leagues on August 2. In nine appearances for Pittsburgh down the stretch, Holderman posted a 1–0 record and 6.75 ERA with six strikeouts across innings pitched.

On May 4, 2023, Holderman pitched an immaculate inning against the Tampa Bay Rays, retiring Taylor Walls, Luke Raley, and Christian Bethancourt in order. In 58 appearances out of the bullpen for Pittsburgh, he compiled an 0–3 record and 3.86 ERA with 58 strikeouts and two saves over 56 innings of work.

Holderman made 55 appearances out of the bullpen for Pittsburgh during the 2024 season, registering a 3–6 record and 3.16 ERA with 56 strikeouts across innings pitched.

Holderman made 24 appearances for the Pirates in 2025, but struggled to an 0–2 record and 7.01 ERA with 18 strikeouts and one save across innings pitched. On November 18, 2025, Holderman was designated for assignment by Pittsburgh. On November 21, he was non-tendered by the Pirates and became a free agent.

Cleveland Guardians On December 11, 2025, Holderman signed a one-year, $1.5 million contract with the Cleveland Guardians.

Personal life Holderman was raised with an older sister, Taylor, who has Angelman syndrome, younger brother Casey, and younger sister Cassidy.

Holderman married his wife, Casey Spence, in December 2020. In May 2023, Holderman and his wife announced they were expecting a child in November 2023. They had a daughter, Tanner.

Holderman is a Christian.

In March 2024, Holderman was hospitalized with a severe case of Influenza A virus.