 October 23, 1977 Busniuk signed as a free agent by Philadelphia and was assigned to the Maine Mariners in the AHL.The Mariners were Calder cup champions in 1978 and 1979, and Busniuk became the only person to play on four consecutive Calder Cup winning teams.Three games into the 1979–80 season, Busniuk was called up from the Mariners to the NHL's Philadelphia Flyers.