My vote is Sudden Death w/ Jean-Claude. Penguins in the Cup? Junior hockey goalie jumps into game 7 and plays better than the starter? Sounds too much like Top-Indian (Dances with Wolves) or Top-Samurai (The Last Samurai).
Without question, it is "Face Off", a 1971 film about a player for the Toronto Maple Leafs and his hippie/non-violent-preachin' girlfriend. It is horrid. I threaten to show it on CRC trips if the kids act up too bad. Thank god, I've never had to break it out.