"Lux Radio Theater" broadcast a 60 minute radio adaptation of the movie on
Monday, October 4th, 1943 with Gary Cooper reprising his film role.
"Screen Director's Playhouse" broadcast a 30 minute radio adaptation of the movie on Friday, September 30th, 1949 with Gary Cooper reprising his film role.
Babe Ruth missed several days of shooting and filming, during the production, because of his own illness.
Lou Gehrig's famous retirement quote, "Today, I consider myself the luckiest man on the face of the earth.", was originally spoken on Tuesday, July 4th, 1939. And it was voted as the #38 movie quote by the American Film Institute (out of 100).
In reality, Gary Cooper was decidedly not a fan of baseball and required extensive coaching in order to look even passable on a baseball diamond. In fact, he had never played the game before, even as a youth, and had never even seen a baseball game in person until he was hired for this film.
Ranked #3 on the American Film Institute's list of the 10 greatest films in the genre "Sports" in June 2008.
Released just 17 months after Lou Gehrig's death.
Since star Gary Cooper was right-handed and Lou Gehrig was left-handed, and since Cooper's athletic skills were barely passable right-handed let alone left-handed, the close-up baseball scenes were shot with uniforms in reverse type. Cooper would hit the ball and run to third, and the prints would be reversed.
Sportswriter Hank Hanneman (Dan Duryea) is loosely based on Hearst newspapers writer Ford Frick, who was the ghost writer of Babe Ruth's autobiography. Later as Commissioner of Baseball he attempted to list Ruth's and Roger Maris' season home run records separately to preserve Ruth's record.
Sportswriter, "Sam Blake" (played by Walter Brennan) was loosely based on writer Fred Lieb, who was one of the Gehrig's closest friends.
When Samuel Goldwyn began looking for someone to play Lou Gehrig in "Pride of the Yankees," he quizzed baseball writers. The Sporting News polled the fans, and their pick was Cleavland Indians pitcher Johnny Humphries because of the strong facial resemblance. Goodwyn considered the candidates and chose actor Gary Cooper for the role. In a later movie Lifeboat, Cooper mentions Johnny Humphries in a scene.
While filming the movie, Teresa Wright - who played Gehrig's wife Eleanor Gehrig - wore the actual bracelet that Lou gave to Eleanor on their fourth anniversary. Eleanor brought the bracelet to the set to be used in the movie. The bracelet is made up of 17 metal medallions that celebrate the seven World Championships and six All-Star game appearances that Gehrig made. The bracelet is now displayed in the Baseball Hall of Fame.