Jean Joseph Octave Dubuc (September 15, 1888 – August 28, 1958), sometimes known by the nickname "Chauncey", was a right-handed American baseball pitcher, manager, and scout, and a coach of both baseball and ice hockey. Dubuc was an above average hitting pitcher in his major league career, posting a .230 batting average (150-for-652) with 57 runs, 23 doubles, 10 triples, 4 home runs, 58 RBI and drawing 30 bases on balls. He was used as a pinch hitter 109 times and also played five games in the outfield.