| No. | Result | Record | Opponent | Type | Round, time | Date | Location | Notes |
| 50 | Loss | 42–7–1 | Gerry Cooney | TKO | 1 (10), 0:54 | May 11, 1981 | Madison Square Garden, New York City, New York, U.S. | |
| 49 | Win | 42–6–1 | Randall Cobb | SD | 10 | Nov 7, 1980 | HemisFair Arena, San Antonio, Texas, U.S. | |
| 48 | Draw | 41–6–1 | Scott LeDoux | SD | 10 | Aug 19, 1979 | Metropolitan Sports Center, Bloomington, Minnesota, U.S. | |
| 47 | Loss | 41–6 | Earnie Shavers | KO | 1 (12), 1:58 | Mar 23, 1979 | Las Vegas Hilton, Winchester, Nevada, U.S. | |
| 46 | Win | 41–5 | Randy Stephens | KO | 3 (10), 2:42 | Nov 10, 1978 | Caesars Palace, Paradise, Nevada, U.S. | |
| 45 | Loss | 40–5 | Larry Holmes | SD | 15 | Jun 9, 1978 | Caesars Palace, Paradise, Nevada, U.S. | Lost WBC heavyweight title |
| 44 | Win | 40–4 | Jimmy Young | SD | 15 | Nov 5, 1977 | Caesars Palace, Paradise, Nevada, U.S. | WBC heavyweight title eliminator; Norton awarded title four months later |
| 43 | Win | 39–4 | Lorenzo Zanon | KO | 5 (10), 3:08 | Sep 14, 1977 | Caesars Palace, Paradise, Nevada, U.S. | |
| 42 | Win | 38–4 | Duane Bobick | TKO | 1 (12), 0:58 | May 11, 1977 | Madison Square Garden, New York City, New York, U.S. | |
| 41 | Loss | 37–4 | Muhammad Ali | UD | 15 | Sep 26, 1976 | Yankee Stadium, New York City, New York, U.S. | For WBA, WBC and The Ring heavyweight titles |
| 40 | Win | 37–3 | Larry Middleton | TKO | 10 (10), 2:17 | Jul 10, 1976 | San Diego Sports Arena, San Diego, California, U.S. | |
| 39 | Win | 36–3 | Ron Stander | TKO | 5 (12), 1:19 | Apr 30, 1976 | Capital Centre, Landover, Maryland, U.S. | |
| 38 | Win | 35–3 | Pedro Lovell | TKO | 5 (12), 1:40 | Jan 10, 1976 | Las Vegas Convention Center, Paradise, Nevada, U.S. | |
| 37 | Win | 34–3 | Jose Luis Garcia | KO | 5 (10), 1:50 | Aug 14, 1975 | Civic Center, Saint Paul, Minnesota, U.S. | |
| 36 | Win | 33–3 | Jerry Quarry | TKO | 5 (12), 2:29 | Mar 24, 1975 | Madison Square Garden, New York City, New York, U.S. | Won vacant NABF heavyweight title |
| 35 | Win | 32–3 | Rico Brooks | KO | 1 (10), 1:34 | Mar 4, 1975 | Red Carpet Inn, Oklahoma City, Oklahoma, U.S. | |
| 34 | Win | 31–3 | Boone Kirkman | RTD | 7 (10) | Jun 25, 1974 | Center Coliseum, Seattle, Washington, U.S. | |
| 33 | Loss | 30–3 | George Foreman | TKO | 2 (15), 2:00 | Mar 26, 1974 | Poliedro, Caracas, Venezuela | For WBA, WBC, and The Ring heavyweight titles |
| 32 | Loss | 30–2 | Muhammad Ali | SD | 12 | Sep 10, 1973 | Forum, Inglewood, California, U.S. | Lost NABF heavyweight title |
| 31 | Win | 30–1 | Muhammad Ali | SD | 12 | Mar 31, 1973 | San Diego Sports Arena, San Diego, California, U.S. | Won NABF heavyweight title |
| 30 | Win | 29–1 | Charlie Reno | UD | 10 | Dec 13, 1972 | San Diego, California, U.S. | |
| 29 | Win | 28–1 | Henry Clark | TKO | 9 (10) | Nov 21, 1972 | Sahara Tahoe, Stateline, Nevada, U.S. | |
| 28 | Win | 27–1 | James J. Woody | RTD | 8 (10) | Jun 30, 1972 | San Diego, California, U.S. | |
| 27 | Win | 26–1 | Herschel Jacobs | UD | 10 | Jun 5, 1972 | San Diego, California, U.S. | |
| 26 | Win | 25–1 | Jack O'Halloran | UD | 10 | Mar 17, 1972 | Coliseum, San Diego, California, U.S. | |
| 25 | Win | 24–1 | Charlie Harris | TKO | 3 (10) | Feb 17, 1972 | Coliseum, San Diego, California, U.S. | |
| 24 | Win | 23–1 | James J. Woody | UD | 10 | Sep 29, 1971 | Coliseum, San Diego, California, U.S. | |
| 23 | Win | 22–1 | Chuck Haynes | KO | 7 (10), 1:08 | Aug 7, 1971 | Civic Auditorium, Santa Monica, California, U.S. | |
| 22 | Win | 21–1 | Vic Brown | KO | 5 (10) | Jun 12, 1971 | Civic Auditorium, Santa Monica, California, U.S. | |
| 21 | Win | 20–1 | Steve Carter | TKO | 3 (10) | Jun 12, 1971 | Valley Music Theater, Woodland Hills, California, U.S. | |
| 20 | Win | 19–1 | Roby Harris | KO | 2 (10), 1:35 | Oct 16, 1970 | Coliseum, San Diego, California, U.S. | |
| 19 | Win | 18–1 | Chuck Leslie | UD | 10 | Sep 26, 1970 | Valley Music Theater, Woodland Hills, California, U.S. | |
| 18 | Win | 17–1 | Roy Wallace | KO | 4 (10) | Aug 29, 1970 | Coliseum, San Diego, California, U.S. | |
| 17 | Loss | 16–1 | Jose Luis Garcia | KO | 8 (10) | Jul 2, 1970 | Grand Olympic Auditorium, Los Angeles, California, U.S. | |
| 16 | Win | 16–0 | Ray Junior Ellis | KO | 2 (10), 0:53 | May 8, 1970 | Coliseum, San Diego, California, U.S. | |
| 15 | Win | 15–0 | Bob Mashburn | KO | 4 (10), 1:40 | Apr 7, 1970 | Cleveland Arena, Cleveland, Ohio, U.S. | |
| 14 | Win | 14–0 | Stamford Harris | TKO | 3 (10), 1:59 | Mar 13, 1970 | Coliseum, San Diego, California, U.S. | |
| 13 | Win | 13–0 | Aaron Eastling | KO | 2 (10), 3:06 | Feb 4, 1970 | Silver Slipper, Paradise, Nevada, U.S. | |
| 12 | Win | 12–0 | Julius Garcia | TKO | 3 (10) | Oct 21, 1969 | Coliseum, San Diego, California, U.S. | |
| 11 | Win | 11–0 | Gary Bates | TKO | 8 (10) | Jul 25, 1969 | Coliseum, San Diego, California, U.S. | |
| 10 | Win | 10–0 | Bill McMurray | TKO | 7 (10) | Jul 25, 1969 | Grand Olympic Auditorium, Los Angeles, California, U.S. | |
| 9 | Win | 9–0 | Pedro Sanchez | TKO | 2 (10) | Mar 31, 1969 | International Sports Center, San Diego, California, U.S. | |
| 8 | Win | 8–0 | Wayne Kindred | TKO | 9 (10) | Feb 20, 1969 | Grand Olympic Auditorium, Los Angeles, California, U.S. | |
| 7 | Win | 7–0 | Joe Hemphill | TKO | 3 (10), 1:52 | Feb 11, 1969 | Valley Music Theater, Woodland Hills, California, U.S. | |
| 6 | Win | 6–0 | Cornell Nolan | KO | 6 (10) | Dec 8, 1968 | Grand Olympic Auditorium, Los Angeles, California, U.S. | |
| 5 | Win | 5–0 | Wayne Kindred | TKO | 6 (10) | Jul 23, 1968 | Circle Arts Theatre, San Diego, California, U.S. | |
| 4 | Win | 4–0 | Jimmy Gilmore | KO | 7 (8), 1:20 | Mar 26, 1968 | Community Concourse, San Diego, California, U.S. | |
| 3 | Win | 3–0 | Harold Dutra | KO | 3 (6) | Feb 6, 1968 | Memorial Auditorium, Sacramento, California, U.S. | |
| 2 | Win | 2–0 | Sam Wyatt | PTS | 6 | Jan 16, 1968 | Community Concourse, San Diego, California, U.S. | |