 Calabro had stops in the Central Hockey League, where he broadcast games for the Indianapolis Checkers, as well as at Purdue University and University of Missouri where he called basketball games.He began his professional career as the play-by-play announcer for the Kansas City Kings in the 1983–84 season.In the 1987–88 season, he came on board with the SuperSonics alongside original Sonics play-by-play announcer Bob Blackburn.