Générique complet
The Pittsburgh Kid
BC
Billy Conn
Billy Conn
Jean Parker
Patricia Mallory
Dick Purcell
Cliff Halliday
Alan Baxter
Joe Barton
Veda Ann Borg
Barbara Ellison
Jonathan Hale
Max Ellison
Ernest Whitman
Feets Johnson
John Kelly
Knockout Riley
Etta McDaniel
Magenta
Dick Elliott
Garvey
John Harmon
Morrie
Robert Barron
Devlin
HA
Henry Armstrong
Sparring Partner
SB
Sam Balter
Radio announcer (voice)
AD
Arthur Donovan
Referee
JR
Jack Roper
The Champ
Freddie Steele
Freddie Steel
DT
Dan Tobey
Fight Announcer
Edmund Cobb
(uncredited)
Donald Douglas
(uncredited)
William Forrest
(uncredited)
HG
Harrison Greene
(uncredited)
Kit Guard
(uncredited)
Russell Hicks
(uncredited)
Nora Lane
(uncredited)
Charles Sullivan
(uncredited)
WT
William Telaak
(uncredited)