For the Italian musician, please see Tony Esposito (musician).
Anthony James "Tony O" Esposito (born April 23, 1943 in Sault Ste. Marie, Ontario) is a retired professional ice hockey goaltender, who played in the National Hockey League, most notably for the Chicago Black Hawks. He was one of the pioneers of the now popular butterfly style.
Esposito grew up Sault Ste. Marie, Ontario with his brother, fellow future NHL star Phil Esposito. He played college hockey for Michigan Tech University.