Renowned Hall of Famer Harold "Pie" Traynor, Pittsburgh Pirates third baseman, appears toward the end of the film in a cameo. The ballplayer-turned manager-turned sports announcer plays a Pirates coach in the film and also was hired to serve as the film's technical sports advisor.
The manager, McGovern's, apartment number is 316. That's the most quoted scripture from the Bible, John 3:16, "For God so loved the world that He gave His only begotten son, that whosoever believeth in Him should not perish, but have everlasting life." Perhaps a little subliminal heavenly connection?
The greenery behind the left field wall behind Forbes Field is known as Shenley Park and the white tomb stone in center field is called the Barney Dreyfuss monument . Dreyfuss was the original owner of the Pittsburgh club.
For the top of the 9th inning, the Pirates are shown taking the field but without wearing baseball gloves/mitts. It was common practice until the mid-1950s for major league baseball players to leave their baseball gloves on the field at the end of a half inning instead of taking them back to the dugout. A new ruling in 1954 specifically stipulated that ballplayers cannot leave equipment on the field. As this film was made prior to that ruling (released in 1951), it pre-dates the 1954 ruling and thus the players leaving the dugout and taking the field 'gloveless' is shown correctly.
In the real world, the 1951 New York baseball Giants won the National league pennant in a three-game playoff over the Brooklyn Dodgers with the help of some angels of their own as Brooklyn was leading 4-2 in the bottom of the ninth inning when the miracle of Coogan's Bluff occurred as Bobby Thompson hit the SHOT HEARD ROUND THE WORLD, a three-run homer, defeating Brooklyn 5-4.
The cursing in the film was handled by taking an actual recording of classic double-talk, cutting it into multiple segments of one or two syllables, rearranging them and pasting them back together. A similar trick was used 31 years later in Star Trek II: The Wrath of Khan (1982) when Spock speaks to Savaak in the Vulcan language. While many assume that this was a simple reversal of the audio, this is not the case.