John Aloysius "Buddy" Hassett (September 5, 1911 – August 23, 1997) was an American professional baseball first baseman and outfielder.

He played in Major League Baseball (MLB) for the Brooklyn Dodgers, Boston Bees / Braves, and New York Yankees.

In 1935 he played for the Columbus Redbirds and hit .337 in the American Association[2] and won a starting job in the majors for the next seven seasons.

Hassett was player coach of a team of players from the US Navy Pre-flight training program in Chapel Hill, North Carolina that went to New York to play a War Chest benefit against a team of All Stars from the Yankees and Cleveland Indians, coached by Babe Ruth.

Billy played professional basketball for the Chicago Gears, the Buffalo Bisons the Tri-City Blackhawks, the Minneapolis Lakers and the Baltimore Bullets (1946–1950).