Slapshot, Requiem For A Heavyweight, Bull Durham, Remember The Titans were all good. Need to rent Friday Night Lights, heard it was good as well.
Good link - SI's Best Sports Movies of All-Time
Edit to add that I hated "Rocky." I understand that the result of the climactic bout at the end isn't what is ultimately important and redeeming about the character and the film itself, but come on. He gets his ass whooped... :P