 Derailed by a bout of tuberculosis, occasional injuries and the perception that he would serve better as a defensive player, he served two seasons for the Kingston Frontenacs of the Eastern Professional Hockey League and six with the Hershey Bears of the American Hockey League, playing only large sections of the 1963 and 1964 seasons with the Bruins.By 1967 there was no place on the newly powerful Bruins for Leiter, and he was a fixture on the Bears, where he was a scoring leader his final four seasons.1971, his final year in Hershey, was his best, leading the team in scoring and being named to the AHL's Second All-Star Team.