A rivalry develops between a district attorney named Devons, who finds murder mysteries amusing but amateurish, and Pauline Ward, a crime novelist. They play tricks on one another, attempting to prove their point over how to solve a crime.

One night before a prizefight, when the lights are momentarily dimmed, a boxer is suddenly killed in the ring. The only clue Devons and Ward have is a tune that a man was whistling. The police detain every spectator from ringside, considering them all as suspects, including Edna Mayberry, a woman who had an involvement with the dead fighter. Pauline is threatened in a dressing room before the case is solved.

• Neil Hamilton as Bill Devons
• Evelyn Venable as Pauline Ward
• Jimmy Wallington as Nick Nicholls
• Barbara Pepper as Althea Ames
• Lucien Littlefield as Watchman
• Lynne Roberts as Edna Mayberry
• Charles Williams as Jake
• James Spottswood as Albert "Slats" Keefe
• Reed Hadley as Ralph Mortimer
• Robert Homans as Captain Joseph Filsom
• William Haade as Tommy Madison - the Champ
• Pat Flaherty as Ace Cummings
• Dan Tobey as Announcer Dan Tobey
• Al Bayne as Max
• Smiley Burnette as Smiley Burnette

• "She'll Be Coming 'Round the Mountain"

• List of boxing films

• Hollywood Stadium Mystery at IMDb  
• Hollywood Stadium Mystery is available for free viewing and download at the Internet Archive