Biography

BIOGRAPHY

Robert John Gsellman was born on July 18, 1993, in Santa Monica, California. He is a pitcher in the MLB. Gsellman is the son of Bob Gsellman, a former minor league catcher drafted by the Philadelphia Phillies in the 23rd round of the 1984 MLB Draft from Culver City High School in California. 

Gsellman attended Westchester High School in Los Angeles where he played both basketball and baseball. He was a California Interscholastic Federation state champion in basketball as a junior and voted team captain as a senior. As a junior baseball player, he had a .649 batting average and 1.67 ERA. He was also named to ESPN RISE's Underclassmen All-California team.  As a senior, he finished with a .608 batting average with eight home runs and a 1.70 ERA. He verbally committed to Los Angeles Harbor College as a senior.

Robert Gsellman signed with the Washington Nationals prior to the 2024 season.