74.United States National Championships - Las Vegas - April 8-10 1964
Semifinals
| 1964-04-10 | 51kg | Melvin Miller | Benny Gerolaga | PTS |
| 1964-04-10 | 51kg | Wallace Brooks | Howard Smith | PTS |
| 1964-04-10 | 54kg | Arthur Jones | Mike Adams | PTS |
| 1964-04-10 | 54kg | Gerry Lott | Victor Contreras | PTS |
| 1964-04-10 | 57kg | Pete Spanakos | Pete Browner | PTS |
| 1964-04-10 | 57kg | Charles Brown | Jose Alonso | PTS |
| 1964-04-10 | 60kg | Herb Dolloson | Willie Thomas | PTS |
| 1964-04-10 | 60kg | Ronald Allen Harris | Alton Colter | PTS |
| 1964-04-10 | 63,5kg | Tom Davis | Ernest Austin | TKO 3 |
| 1964-04-10 | 63,5kg | Freddy Ward | Tommy O'Shea | PTS |
| 1964-04-10 | 67kg | Quincey Daniels | Bernie Magallanes | PTS |
| 1964-04-10 | 67kg | Jesse Valdez | Martin Houk | PTS |
| 1964-04-10 | 71kg | Toby Gibson | Martino Berzewski | TKO 1 |
| 1964-04-10 | 71kg | Pete Esquivel | Larry Tadom | PTS |
| 1964-04-10 | 75kg | William Cross | Mel Johnson | PTS |
| 1964-04-10 | 75kg | Bob McMillian | Carcell Ricks | PTS |
| 1964-04-10 | 81kg | Rudy Brown | Jim Evans | PTS |
| 1964-04-10 | 81kg | Bob Christopherson | Steve Grant | PTS |
| 1964-04-10 | +81kg | Buster Mathis | Jim Hall | PTS |
| 1964-04-10 | +81kg | Al Wilson | Clay Hodges | TKO 1 |
Finals
| 1964-04-10 | 51kg | Melvin Miller | Wallace Brooks | PTS |
| 1964-04-10 | 54kg | Arthur Jones | Gerry Lott | PTS |
| 1964-04-10 | 57kg | Charles Brown | Pete Spanakos | TKOI 1 |
| 1964-04-10 | 60kg | Ronald Allen Harris | Herb Dolloson | PTS |
| 1964-04-10 | 63,5kg | Freddy Ward | Tom Davis | PTS |
| 1964-04-10 | 67kg | Jesse Valdez | Quincey Daniels | PTS |
| 1964-04-10 | 71kg | Toby Gibson | Pete Esquivel | TKO 3 |
| 1964-04-10 | 75kg | William Cross | Bob McMillian | TKO 1 |
| 1964-04-10 | 81kg | Bob Christopherson | Rudy Brown | PTS |
| 1964-04-10 | +81kg | Buster Mathis | Al Wilson | PTS |