I'm not even a sports fan, but Slap Shot (1977) made me want to learn more about hockey and its history. The movie is amazing overall, but of course, the highlight for me are the Hanson Brothers (no, not THOSE Hansons!) and now it's my favorite film of the genre.
Inspired by this scene: https://www.youtube.com/watch?v=VHMi-j7W2gM&ab_channel=Movieclips
The Hansons have a lot of great lines, but this cracks me up every time!