Have read the 'Mickey Rourke sparred Monzon' story on the Net somewhere before. BoxRec shows Rourke with 6-0-2 at light heavy.
would have had to have happened in the early 90's if true. And if so no suprise, as a top tier boxer could / would easily be able to do that. Even after being out of the game for a while. If true I don't see it as a bad reflection on MR in any way.