According to The Hollywood Reporter, Mikael Salomon will be directing Undefeated: The Rocky Marciano Story.

This is the first authorized biopic about the former boxing champion. He is the only one to ever retire and remain undefeated. The film looks at Marciano's early life up until his untimely death in a plane crash in 1969.

Terri Apple wrote the screenplay.

Evan Jacobs at Movieweb
Evan Jacobs