He played junior hockey for the St. Catharines Black Hawks from 1965 to 1967 and turned pro with the Dallas Black Hawks in 1967-68. The Chicago Blackhawks called him up for six games in 1968-69 but otherwise he played in the minor pros until 1972. In that year he jumped to the Los Angeles Sharks of the World Hockey Association (WHA) and began a three-and-a-half year career in that league. LeBlanc jumped back to the NHL in 1975 to the Detroit Red Wings, who had traded a draft pick to Chicago for him.