The film evokes the career of boxer Luis Ángel Firpo.
| Actor | Role |
|---|---|
 Luis FirpoPromotor | Promotor |
 Ricardo Castro RíosNot listed | Not listed |
| RRaúl del ValleNot listed | Not listed |
| GGloria RamírezNot listed | Not listed |
| SSamuel GiménezNot listed | Not listed |
 Cirilo EtulainNot listed | Not listed |
| RRosita MariónNot listed | Not listed |
| KKid CachetadaBoxeador | Boxeador |
| MMauro CíaBoxeador | Boxeador |
| JJuan OviedoBoxeador | Boxeador |
| OOsvaldo PereiraBoxeador | Boxeador |
| OOscar MontesBoxeador | Boxeador |
| DDomingo SuazoBoxeador | Boxeador |