[citation needed] The Terriers won the J. Ross Robertson Cup as the OHA Senior A League champions in 1970 and 1973.

[4] The Terriers also won the 1973 Allan Cup as Canadian Senior A champions, defeating the visiting St. Boniface Mohawks of Manitoba 4-1 in a best-of-seven final playdown series.

[citation needed] The 1972-73 edition of the club featured a number of veterans like Mike Draper, Gary Milroy and Grant Moore, all of whom had been in place since the first season, 1968-69.

Also on the team were: Claire Alexander, who later played for the Toronto Maple Leafs; Jim Keon, brother of then-Leaf captain Dave Keon; Blake Ball, who played Gilmore Tuttle in the 1977 film "Slap Shot"; and goalie Louis Levasseur, who went on to all-star status in the World Hockey Association.

[citation needed] Orillia dropped down to Intermediate A in 1979 and left that league in 1982.