- Bruce Bennett
- Hal "Chopper' Donovan, aka Hal Smith
- Jeanne Martel
- Katherine 'Kay' Conrad
- Fuzzy Knight
- Spider
- J. Farrell MacDonald
- Bill 'One-Punch' Fagin
- Guinn 'Big Boy' Williams
- Slug Cassidy
- Dickie Jones
- Dickie Martin
- Charles Williams
- Meggs, the Reporter
- John Elliott
- Jim Conrad
- William 'Billy' Benedict
- Monk, Tall Kid
- Jack 'Tiny' Lipson
- Duncan
- Buster the Dog
- Fella - Hal's Dog
- Friday the Dog
- Lady, Kay's Dog
- Richard Alexander
- Fritz
- James Baker
- Lee
- Bob Burns
- Health Camp Man / Fight Spectator (uncredited)
- Ace Cain
- 1st Tramp
- Horace B. Carpenter
- Health Camp Man
- Steve Clark
- 2nd Ring Announcer
- Robert F. Hill
- Health Camp Instructor
- Murdock MacQuarrie
- Health Camp Man / Fight Spectator (uncredited)
- James C. Morton
- Referee
- Fred Parker
- Health Camp Man
- Bud Pope
- 2nd Tramp
- Bob Terry
- Brunt
- Frank Wayne
- Doctor
