At the time this movie was filmed, major league baseball had been integrated for two seasons. However, there are no African American ballplayers in the cast or even in the stock footage. The only African-American, was in a cameo scene as a janitor, that saw Kelly's "salve" over Monk Lanigan's hair 'crackle' he immediately said "I need a drink" and quickly left.
All the baseball teams are identified by their city but never by their nicknames. Even the home team uniforms, which should have the team nicknames, list the city instead. The reason is because the commissioner of baseball, Happy Chandler, would not sanction the movie because of the cheating element in the movie. So 20th Century Fox could not use the the name of the teams or even use cameo baseball player walk ons like the studio wanted to do.
When manager Dolan asks Vernon what his name is he briefly scans the outfield fence and see's a sign for Kelly Tires and tells Dolan that his name is Kelly. While this brief scene was in the film when it was released for TV in the 1960's it has now been cut from the film.
"Lux Radio Theater" broadcast a 60 minute radio adaptation of the movie on Monday, October 3rd, 1949 with Ray Milland reprising his two film character roles of Professor, Vernon Simpson and alias name, King Kelly.
"Screen Director's Playhouse" broadcast a 30 minute radio adaptation of the movie on Friday, April 14th, 1950 with Ray Milland reprising his film two character roles. Which was 193 days (27 weeks and 4 days) after Ray Milland did another radio station reprise of his role, in the movie at "Lux Radio Theater", on Monday, October 3rd, 1949.
Ray Milland coats a majority of baseballs he pitches with his special chemical concoction from a pad hidden inside his glove. Although the movie never indicates how long the coating on a ball remains effective, baseball fans know that the umpire replaces the baseball after about each foul ball and approximately six pitches. So, there was little chance that Milland's coated baseballs might accidentally end up in the hands of the opposing team's pitcher, allowing him pitch the same hopping curve balls that Milland was able to throw.
The Greenleaf's residential address is listed as 2035 Rock Road West 831. [City and State are not listed, on a piece of paper King Kelly gave to St. Loius catcher, Monk Lanigan, as King Kelly, Vernon Simpson in reality. He nicknamed himself as King Kelly], departed each other, shortly after their World Series championship and prof. Vernon Simpson's career-ending injury, catching the baseball for the final out in the ninth inning of the seventh and final game.
Vernon Simpson, alias King Kelly, had two uniform numbers. 12 was his uniform number, when he first practiced for Saint Louis. 22 was his uniform number after being accepted by the Saint Louis' owner and manager, after they saw his pitching performance. How his uniform numbers, 12 & 22 were picked as fractions of 1/2 & 2/2.
After 'Prof. Vernon K. Simpson/King Kelly''s discovery of the baseball that hit his window and broke his current system for a repellent of mice, muskrats (rodents) are mixed together sooner than he had planned, after his glass chemical tubes were destroyed by a baseball and are blended together, the next morning, he visited Professor Greenleaf alone to request a leave from his college teaching career, he mentioned train number 714. 714 is the exact quantity of Major League Baseball home runs hit by first and longest home-run king, Babe Ruth, in his regular-season games, (no post-season or spring training games).
Although St. Louis at this time had a team in both Major League Baseball leagues. National League team is St. Louis Cardinals and American League was the St. Louis Browns. The cities in which the unnamed St. Louis opposing teams, plays are cities with teams in both leagues or with a National League team only.
Many of the baseball scenes were filmed in the old Wrigley Field. Not the famous Wrigley Field in Chicago, but the former minor league Wrigley Field in Los Angeles. It was the home of two former minor league teams in the Pacific Coast League, the Los Angeles Angels and the Hollywood Stars. It was also the home field of the new American League expansion team Los Angeles Angels for their initial 1961 season. Wrigley Field was also the venue for several other baseball movies, as well as the venue for the old TV show "Home Run Derby".
This movie's World Series was like the 1997 World Series. All 4 odd numeral games: 1, 3, 5 and 7 St. Louis won. In 1997, the two teams, were the Florida Marlins and Cleveland Indians. In the movie, the two teams were Saint Louis and New York. There were no consecutive games won, or lost.