Factual error: As Jackie hits his home run, they announce the Dodgers have won the Pennant, indicating a walk off. But that can't be since they are not the home team.
Factual error: Fritz Ostermueller was in reality a left-handed pitcher, not a right-hander as depicted in the scene of the movie.
Factual error: In a post-game interview, Ben Chapman claims that when they play the Yankees, they call Joe DiMaggio a "w*p." But the Phillies, a National League team, don't play the American League Yankees.