5.South American Championships - Portoviejo, Ecuador - July 23-27 1990
Quarter-finals (results not available)
Semi-finals
| 1990-07-?? | 48kg | ??? | ??? | Víctor Prieto | PER | ??? |
| 1990-07-?? | 48kg | ??? | ??? | Ascelie Rodriguez | CHL | ??? |
| 1990-07-?? | 51kg | ??? | ??? | Jose Cardenas | PER | ??? |
| 1990-07-?? | 54kg | ??? | ??? | Juan Sanchez | PER | ??? |
| 1990-07-?? | 57kg | ??? | ??? | Pedro Torres | CHL | ??? |
| 1990-07-?? | 57kg | ??? | ??? | Luis Villalta | PER | ??? |
| 1990-07-?? | 60kg | ??? | ??? | Pedro Torres | PER | ??? |
| 1990-07-?? | 63,5kg | ??? | ??? | Cassius Martel | PER | ??? |
| 1990-07-?? | 63,5kg | ??? | ??? | Otilio Villareal | ECU | ??? |
| 1990-07-?? | 67kg | ??? | ??? | Jose Guzman | VEN | ??? |
| 1990-07-?? | 67kg | ??? | ??? | Eduardo Renteros | PER | ??? |
| 1990-07-?? | 71kg | ??? | ??? | Michael Martel | PER | ??? |
| 1990-07-?? | 75kg | ??? | ??? | Javier Aquino | PER | ??? |
| 1990-07-25 | 81kg | Faustino Gonzalez | COL | Augustin Ascencio | PER | KO 2 |
| 1990-07-25 | 81kg | Celso Campos | ECU | Gerardo Orellana | CHL | ??? |
| 1990-07-25 | 91kg | Víctor Alarcon | COL | Jaime Quinonez | ECU | KO 3 |
| 1990-07-25 | 91kg | Roberto Fernandez | PER | Pedro Jara | CHL | ??? |
Finals
| 1990-07-27 | 48kg | Fernando Barreto | VEN | Tyrone Espinoza | ECU | 4:1 |
| 1990-07-26 | 51kg | Harold Grey | COL | Luis Valarezo | ECU | RSC 1 |
| 1990-07-27 | 54kg | Luis Ojeda | VEN | Patricio Fortty | ECU | 4:1 |
| 1990-07-26 | 57kg | Javier Cortez | ECU | Junior Villarroel | VEN | 4:1 |
| 1990-07-26 | 60kg | Polibio Maldonado | ECU | Aureliano Gutierrez | VEN | PTS |
| 1990-07-26 | 63,5kg | Cesar Cedeno | VEN | Hugo Pineda | COL | RSC 3 |
| 1990-07-26 | 67kg | Manuel Alvarez | COL | Juan Gonzalez | CHL | 4:1 |
| 1990-07-27 | 71kg | William Lopez | ECU | Salvador Labbe | CHL | 4:1 |
| 1990-07-27 | 75kg | Ricardo Araneda | CHL | Osvaldo Sanchez | ECU | 3:2 |
| 1990-07-27 | 81kg | Faustino Gonzalez | COL | Celso Campos | ECU | 5:0 |
| 1990-07-27 | 91kg | Víctor Alarcon | COL | Roberto Fernandez | PER | RSC 2 |
| 1990-07-26 | +91kg | Tayron Mosquera | ECU | Carlos Munante | PER | 4:1 |