Good analysis Pink. Tommy was bouncing and firing shots, that's for sure and he was most definitely troubling Ray with these shots. So I will take the whole running on empty scenario back and replace it with Ray realising that Hearns had fired his best shots and Ray was still strong and could take it.
Leonard realised I believe that he was stronger, fitter and could take a whack better. Tommy could not push Ray back after rd 5. It was simply a matter of time and Ray knew he had the potential to take Tommy out