Michael Anthony Williams costarred with what real-life boxer in Rocky V?
Mike Williams (boxer): Michael Anthony Williams (born June 16, 1962) is an American actor and former professional boxer who competed from 1984 to 2000. Mike Williams (boxer):  He is most notable for portraying fictional boxer Union Cane in the 1990 film "Rocky V". Rocky V: Rocky V is a 1990 American sports drama film. Rocky V:  It is the fifth film in the "Rocky" series, written by and starring Sylvester Stallone, and co-starring Talia Shire, Stallone's real-life son Sage, and real-life boxer Tommy Morrison, with Morrison in the role of Tommy Gunn, a talented yet raw boxer.
Tommy Morrison