Why couldn't Rocky just fight Tommy in the ring?
I never really thought of this until watching the movie the other night. Rocky isn't supposed to fight anymore because of the brain damage that he suffered from his bout with Ivan Drago. Okay, fine then. But why then did Rocky take on Tommy in an unsanctioned and presumably even more dangerous fight in the street with bare-knuckles? Even worse, Rocky can't even profit off of his street fight with Tommy, which his family desperately needed.
TV Tropes also listed out the reasons why Rocky in this movie, was kind of a dickhead even if that wasn't the filmmakers nor Sylvester Stallone's intent:
https://tvtropes.org/pmwiki/pmwiki.php/YMMV/RockyV