Factual error: The third member of the Yankees with a prominent role in the film is Bob Cerv (roommate of Mickey & Roger). In the film, he is with the team from Opening Day. However, Cerv was actually acquired by the Yankees in May of that year.
Factual error: In the lounge scene after Mickey leaves the table, Whitey says that Mickey was 18 years old when he came up to the Yankees in 1951. Mickey was born in October of 1931, and that would have made him 19-years-old in the spring of 1951.