Biography
Benjamin Andrew Williamson (born November 5, 2000) is an American professional baseball third baseman for the Seattle Mariners of Major League Baseball (MLB).
Amateur career
Williamson attended Freedom High School in South Riding, Virginia. He won several awards in his senior season in 2019, including the conference and regional player of the year.
Williamson played college baseball for the William & Mary Tribe. He was named to the First Team All-CAA three consecutive years, from 2021–2023, the first player in school history with such a streak. He also won the CAA Defensive Player of the Year in 2022 after having a .975 fielding percentage. The 2023 season was the best for Williamson where he had a .391 batting average, .513 on base percentage, 12 home runs, and 49 RBIs, while also stealing 14 bases. For his performance on the year he was named CAA Player of the Year. He played nine games of collegiate summer baseball with the Hyannis Harbor Hawks of the Cape Cod Baseball League prior to the 2023 MLB draft.
Professional career
Williamson was selected by the Seattle Mariners in the second round, with the 57th overall selection, of the 2023 Major League Baseball draft. On July 14, 2023, Williamson signed with the Mariners for an under-slot deal worth $600,000. He played in two games for the Arizona Complex League Mariners, then 10 games for the Class-A Modesto Nuts in 2023. He started 2024 with the High-A Everett Aquasox, where he hit .315 in 29 games. In May, he was promoted to the Double-A Arkansas Travelers, where he hit .273 with 3 home runs in 95 games. He had some difficulty adjusting to pitching in Double-A but remained a good defender.
Williamson began the 2025 season with the Triple-A Tacoma Rainiers, batting .281 with three doubles in 14 games. On April 13, the Mariners promoted Williamson to the major leagues for the first time in his career. Two days later, he hit a single in his first major league plate appearance.
Personal life
Williamson grew up in Chantilly, Virginia. His parents are Andrew and Regena Williamson. His mother was a college gymnast at James Madison University.