Michael "Mike" Williams (born June 16, 1962) appears as heavyweight boxing contender Union Cane in Rocky V. He is also a retired real life boxer, his professional career lasted from 1984-1994. His professional record is 25-3 (20 KO). He was born and raised in Lafayette, Louisiana.
Known as "Mercury," Michael Williams began boxing in 1981. He was became the 1984 National Golden Gloves Super heavyweight champion.
After Williams turned pro in 1984 he was considered a rising prospect. He won his first 17 fights, including wins over James Tillis and Tim Witherspoon. In 1988, he stepped up and lost to future world champion James "Buster" Douglas, and he lost again for the NABF title against Alex García. In 1994, Mike Williams defeated Tommy Morrison, the WBO heavyweight champion. The fight was called Tommy Gunn vs Union Cane for real. After defending his title once against Michael Bentt, Williams lost his WBO title to Herbie Hide. He retired in 1994.
Williams also played background character in various other films, such as A Soldier's Story, Full Metal Jacket, Another 48 Hrs, Ali, Losing Isaiah, Soldier Boyz, The Boys Club, The Replacements, A Sense of Entitlement and The Brave One. He also appeared in some TV shows, such as Homicide: Life on the Street and The F.B.I. Files.