101.United States National Championships
Colorado Springs, Colo.
February 24 - March 2, 1991
Quarterfinals
| 1991-02-27 | 48kg | Eric Griffin | James Weary | RSC |
| 1991-02-27 | 48kg | Albert Guardado | Mark McLin | 4:1 |
| 1991-02-27 | 48kg | Orlando Malone | Jeffrey Chavez | 4:1 |
| 1991-02-27 | 48kg | Jerome McIntyre | Willie Haughton | RSC 3 |
| 1991-02-27 | 51kg | Tim Austin | Eddie Willis | RSC 2 |
| 1991-02-27 | 51kg | Jermaine Fields | Bobby Jaramillo | 5:0 |
| 1991-02-27 | 51kg | Lee Rodriguez | Marcel Brown | 3:2 |
| 1991-02-27 | 51kg | John Herrera | James Villastrigo | RSC 3 |
| 1991-02-27 | 54kg | Wayne Chandler | Guillermo Moreno | 5:0 |
| 1991-02-27 | 54kg | Francisco Gonzales | Melvin Carwell | 5:0 |
| 1991-02-27 | 54kg | Sergio Reyes | Frank Molina | RSC 3 |
| 1991-02-27 | 54kg | Lionel Odom | Guillermo Jorrin | 4:1 |
| 1991-02-27 | 57kg | Kenneth Friday | Eddie Croft | 5:0 |
| 1991-02-27 | 57kg | Julian Wheeler | Datris Biagas | 5:0 |
| 1991-02-27 | 57kg | Fernando Sanchez | Sandtanner Lewis | 4:1 |
| 1991-02-27 | 57kg | Ivan Robinson | Martin Ulloa | 5:0 |
| 1991-02-27 | 60kg | Oscar de la Hoya | Rogelio Cabral | 5:0 |
| 1991-02-27 | 60kg | Teddy Randolph | David Santos | 3:2 |
| 1991-02-27 | 60kg | Patrice Brooks | Dezi Ford | 5:0 |
| 1991-02-27 | 60kg | Anthony Christodolou | Larry Nicholson | 5:0 |
| 1991-02-27 | 63,5kg | Vernon Forrest | Lamar Murphy | 4:1 |
| 1991-02-27 | 63,5kg | Hector Colon | Mark Sisneros | RSCH 2 |
| 1991-02-27 | 63,5kg | Larry Wheeler | Sal Lopez | 3:2 |
| 1991-02-27 | 63,5kg | Steve Johnston | Patrick Washington | 5:0 |
| 1991-02-27 | 67kg | Jaime Lerma | Dailyn Hutchinson | AB 3 |
| 1991-02-27 | 67kg | Pepe Reilly | Patrick Byrd | 5:0 |
| 1991-02-27 | 67kg | Pat Briceno | Derrell Butlock | 5:0 |
| 1991-02-27 | 67kg | Timothy Vance | Jim Byrd | 5:0 |
| 1991-02-27 | 71kg | Ravea Springs | Brian Shaw | 5:0 |
| 1991-02-27 | 71kg | Raul Marquez | Joseph Hollis | RSC 1 |
| 1991-02-27 | 71kg | Mark Lanton | Alfredo Layton | 3:2 |
| 1991-02-27 | 71kg | Wayne Blair | Dan Connolly | 3:2 |
| 1991-02-27 | 75kg | Frank Vassar | Melvin Weaselboy Jr | 5:0 |
| 1991-02-27 | 75kg | Chris Byrd | Michael DeMoss | 5:0 |
| 1991-02-27 | 75kg | Ronald Simms | Odell McKinnis | RSC 1 |
| 1991-02-27 | 75kg | Brian Sleeman | Theodor Mercado | 3:2 |
| 1991-02-27 | 81kg | Ray Cunnington | Thomas Williams | DQ 1 |
| 1991-02-27 | 81kg | Terry McGroom | Nathan Jackson | 5:0 |
| 1991-02-27 | 81kg | Jim Compton | Mike Arguello | 5:0 |
| 1991-02-27 | 81kg | Denard Trapp | Donald Houlak | DQ 2 |
| 1991-02-27 | 91kg | Melvin Foster | Raymond Carger | RSCH 2 |
| 1991-02-27 | 91kg | Javier Alvarez | Vaughn Bean | 3:2 |
| 1991-02-27 | 91kg | John Bray | Armando Alvarez | 4:1 |
| 1991-02-27 | 91kg | Bobby Harris | Shannon Briggs | 5:0 |
| 1991-02-27 | +91kg | Archie Perry | Lee Albertson | WO. |
| 1991-02-27 | +91kg | Terry Carter | Edward Escobedo | WO. |
| 1991-02-27 | +91kg | Andrew Sciandra | James Gaines | 4:1 |
| 1991-02-27 | +91kg | Larry Donald | Buster Mathis jr | 5:0 |
Semifinals
| 1991-02-28 | 48kg | Eric Griffin | Albert Guardado | DQ 2 |
| 1991-02-28 | 48kg | Orlando Malone | Jerome McIntyre | 3:2 |
| 1991-02-28 | 51kg | Tim Austin | Jermaine Fields | RSCH 1 |
| 1991-02-28 | 51kg | John Herrera | Lee Rodriguez | 5:0 |
| 1991-02-28 | 54kg | Wayne Chandler | Francisco Gonzales | RSC 2 |
| 1991-02-28 | 54kg | Sergio Reyes | Lionel Odom | 4:1 |
| 1991-02-28 | 57kg | Kenneth Friday | Julian Wheeler | 3:2 |
| 1991-02-28 | 57kg | Ivan Robinson | Fernando Sanchez | RSCH 2 |
| 1991-02-28 | 60kg | Oscar de la Hoya | Teddy Randolph | 5:0 |
| 1991-02-28 | 60kg | Patrice Brooks | Anthony Christodolou | 4:1 |
| 1991-02-28 | 63,5kg | Steve Johnston | Larry Wheeler | DQ 2 |
| 1991-02-28 | 63,5kg | Vernon Forrest | Hector Colon | 3:2 |
| 1991-02-28 | 67kg | Pat Briceno | Timothy Vance | 3:2 |
| 1991-02-28 | 67kg | Pepe Reilly | Jaime Lerma | 4:1 |
| 1991-02-28 | 71kg | Raul Marquez | Ravea Springs | DQ 3 |
| 1991-02-28 | 71kg | Wayne Blair | Mark Lanton | 5:0 |
| 1991-02-28 | 75kg | Chris Byrd | Frank Vassar | 5:0 |
| 1991-02-28 | 75kg | Ronald Simms | Brian Sleeman | RSC 2 |
| 1991-02-28 | 81kg | Terry McGroom | Ray Cunnington | WO. |
| 1991-02-28 | 81kg | Denard Trapp | Jim Compton | DQ 3 |
| 1991-02-28 | 91kg | Javier Alvarez | Melvin Foster | 5:0 |
| 1991-02-28 | 91kg | John Bray | Bobby Harris | RSC 2 |
| 1991-02-28 | +91kg | Archie Perry | Terry Carter | 5:0 |
| 1991-02-28 | +91kg | Larry Donald | Andrew Sciandra | 5:0 |
Finals
| 1991-03-02 | 48kg | Eric Griffin | Orlando Malone | RSC 3 |
| 1991-03-02 | 51kg | Tim Austin | John Herrera | 5:0 |
| 1991-03-02 | 54kg | Sergio Reyes | Wayne Chandler | 5:0 |
| 1991-03-02 | 57kg | Ivan Robinson | Kenneth Friday | PTS |
| 1991-03-02 | 60kg | Oscar de la Hoya | Patrice Brooks | 5:0 |
| 1991-03-02 | 63,5kg | Vernon Forrest | Steve Johnston | 4:1 |
| 1991-03-02 | 67kg | Pepe Reilly | Pat Briceno | 5:0 |
| 1991-03-02 | 71kg | Raul Marquez | Wayne Blair | 3:2 |
| 1991-03-02 | 75kg | Chris Byrd | Ronald Simms | 5:0 |
| 1991-03-02 | 81kg | Terry McGroom | Denard Trapp | 5:0 |
| 1991-03-02 | 91kg | John Bray | Javier Alvarez | 4:1 |
| 1991-03-02 | +91kg | Larry Donald | Archie Perry | 5:0 |