In the movies, yes. Sylvester Stallone played him in the Rocky movies. He wrote the first screenplay after watching the Muhammad Ali-Chuck Wepner fight in 1975. Wepner was not a heavyweight champ.
Rocky Marciano
Rocky Marciano is the only heavyweight champion not to loose a fight.
He was world heavyweight boxing champion from 1952 until his retirement in '56.
Yes, Marciano won the title against Jersey Joe Walcott in 1952. He retired as champion in 1956.
Rocky Balboa
Rocky Marciano
Rocky Marciano was worlds heavyweight champion from '52 - '56.
Rocky Marciano Won the title from Jersey Joe Walcott Final defense was against Archie Moore retired as champion; undefeated
Rocky Marciano
The one and only Rocky Marciano.
Marciano had the shortest reach for a heavyweight champion ever (68 inches). He was also one of the smallest heavyweight champions ever. He stood 5'11 tall.
Rocky weighed under 200 pounds when he was the Heavyweight Champion back in the 1950's, BUT the Cruiserweight division wasn't around.