Trailer
 | Willie Colón as Joaquin Vargas |
 | Rubén Blades as Andy "Kid" Clave |
 | Fred Williamson as Jesse Crowder |
 | Darlanne Fluegel as Sally |
 | Tony Sirico as Frankie |
 | Joe Spinell as Angelo |
 | Nereida Mercado as Nancy |
| Vinny Argiro as Detective Pantano |
 | Sal Carollo as Papa |
| Andy Gerado as Frank |
| Izzy Sanabria as Slim |
 | Alex Stevens as Sal |
 | Kurt Andon as Doctor |
| Marta Viana as Mama |
| Darlene Masucci as Pretty Girl at Party |
| Ted Thurston as Diner Owner |
 | Adrianne Sachs as Jesse's Girlfriend |
| Stan Goldstein as Car Window Washer |
| Frankie Moia as Casino Pit Boss |
| José Torres as Ex-Champ |
 | Don King as Self |
 | Salvador Sánchez as Self |
 | Celia Cruz as Self |
| Johnny Pacheco as Self |
| Héctor Lavoe as Self |
 | Tony Perez as The Referee |
| Burt Sugarman as Self |
 | Don Dunphy as Radio Fight Announcer |
| Manuel Sebastian as Maitre'D |
| Tony Page as Casino Manager |
| Frank Valenza as Angelo's Bodyguard |
| Ernest Johnson as Sparring Partner |
 | Johnny Turner as Fighter #1 |
| Kevin Mahon as Fighter #2 |
| Vern De Paul as 2nd Fight Referee |
| Marvin Goldberg as First Fight Announcer |
| Rudolpho Diaz as Janitor |
| Nick Barbaro as Waiter |
 | Jim Lovelett as Nightclub Fighter |
| John Lumis as Fighter #3 |
| Jenaro Diaz as Fighter #4 |
 | Gloria Irizarry as Maid |
| Jeff McBride as Casino Dealer |
 | Joseph Montalbo as Fan in Nightclub |
 | Jery Hewitt as Nightclub Fighter with Bottle |
| Bonnie Wiseman as Lady at Table in Nightclub |
| Jerry Masucci as Record Producer |
| Jon Fausty as Recording Engineer |
 | Sandy Dell as Ring Girl #1 |
| Katherine Riley as Ring Girl #2 |
| Barbara Smith as Ring Girl #3 |
| Susan Vonschaack as Ring Girl #4 |
| Writing | |
| Fred Williamson | Writer |
Editing | |
| Daniel Loewenthal | Editor |
Directing | |
| Fred Williamson | Director |
Camera | |
| James Lemmo | Director of Photography |
Sound | |
| Jay Chattaway | Original Music Composer |
Production | |
| Jerry Masucci | Producer |
| Scott MacQueen | Production Assistant |
| Steven Wren | Production Assistant |
Lighting | |
| Don Muchow | Best Boy Electrician |
Sound | |
| Mel Zelniker | Sound Re-Recording Mixer |
Art | |
| Robert Wesson | Property Master |
Sound | |
| William 'Spaceman' Patterson | Other |
Directing | |
| Alyce Conrad | Script Supervisor |
| Eric P. Steckler | Assistant Director |
