| No. | Result | Record | Opponent | Type | Round(s), time | Date | Location | Notes |
| 37 | Draw | 32–4–1 | Floyd Cummings | MD | 10 | December 3, 1981 | International Amphitheatre, Chicago, Illinois, U.S. | |
| 36 | Loss | 32–4 | George Foreman | TKO | 5 (12), 2:26 | Jun 15, 1976 | Nassau Veterans Memorial Coliseum, Hempstead, New York, U.S. | For NABF heavyweight title |
| 35 | Loss | 32–3 | Muhammad Ali | RTD | 14 (15), 3:00 | Oct 1, 1975 | Philippine Coliseum, Quezon City, Philippines | For WBA, WBC, and The Ring heavyweight titles |
| 34 | Win | 32–2 | Jimmy Ellis | TKO | 9 (12), 0:59 | March 2, 1975 | Junction Oval, Melbourne, Australia | |
| 33 | Win | 31–2 | Jerry Quarry | TKO | 5 (10), 1:37 | June 17, 1974 | Madison Square Garden, New York City, New York, U.S. | |
| 32 | Loss | 30–2 | Muhammad Ali | UD | 12 | Jan 28, 1974 | Madison Square Garden, New York City, New York, U.S. | For NABF heavyweight title |
| 31 | Win | 30–1 | Joe Bugner | PTS | 12 | July 2, 1973 | Earls Court Exhibition Centre, London, England | |
| 30 | Loss | 29–1 | George Foreman | TKO | 2 (15), 2:26 | Jan 22, 1973 | National Stadium, Kingston, Jamaica | Lost WBA, WBC, and The Ring heavyweight titles |
| 29 | Win | 29–0 | Ron Stander | RTD | 4 (15), 3:00 | May 25, 1972 | Civic Auditorium, Omaha, Nebraska, U.S. | Retained WBA, WBC, and The Ring heavyweight titles |
| 28 | Win | 28–0 | Terry Daniels | TKO | 4 (15), 1:47 | January 15, 1972 | Rivergate Auditorium, New Orleans, Louisiana, U.S. | Retained WBA, WBC, and The Ring heavyweight titles |
| 27 | Win | 27–0 | Muhammad Ali | UD | 15 | Mar 8, 1971 | Madison Square Garden, New York City, New York, U.S. | Retained WBA, WBC, The Ring heavyweight titles |
| 26 | Win | 26–0 | Bob Foster | KO | 2 (15), 0:49 | November 18, 1970 | Cobo Arena, Detroit, Michigan, U.S. | Retained WBA, WBC, and The Ring heavyweight titles |
| 25 | Win | 25–0 | Jimmy Ellis | RTD | 4 (15) | February 16, 1970 | Madison Square Garden, New York City, New York, U.S. | Retained NYSAC heavyweight title;Won WBA and vacant WBC heavyweight titles |
| 24 | Win | 24–0 | Jerry Quarry | RTD | 7 (15), 3:00 | June 23, 1969 | Madison Square Garden, New York City, New York, U.S. | Retained NYSAC heavyweight title |
| 23 | Win | 23–0 | Dave Zyglewicz | KO | 1 (15), 1:36 | April 22, 1969 | Sam Houston Coliseum, Houston, Texas, U.S. | Retained NYSAC heavyweight title |
| 22 | Win | 22–0 | Oscar Bonavena | UD | 15 | December 10, 1968 | Spectrum, Philadelphia, Pennsylvania, U.S. | Retained NYSAC heavyweight title |
| 21 | Win | 21–0 | Manuel Ramos | TKO | 2 (15), 3:00 | June 24, 1968 | Madison Square Garden, New York City, New York, U.S. | Retained NYSAC heavyweight title |
| 20 | Win | 20–0 | Buster Mathis | TKO | 11 (15), 2:33 | March 4, 1968 | Madison Square Garden, New York City, New York, U.S. | Won vacant NYSAC heavyweight title |
| 19 | Win | 19–0 | Marion Connor | TKO | 3 (10), 1:40 | December 18, 1967 | Boston Garden, Boston, Massachusetts, U.S. | |
| 18 | Win | 18–0 | Tony Doyle | TKO | 2 (10), 1:04 | October 17, 1967 | Spectrum, Philadelphia, Pennsylvania, U.S. | |
| 17 | Win | 17–0 | George Chuvalo | TKO | 4 (10), 0:16 | July 19, 1967 | Madison Square Garden, New York City, New York, U.S. | |
| 16 | Win | 16–0 | George Johnson | UD | 10 | May 4, 1967 | Grand Olympic Auditorium, Los Angeles, California, U.S. | |
| 15 | Win | 15–0 | Jefferson Davis | TKO | 5 (10), 0:48 | April 11, 1967 | Auditorium, Miami Beach, Florida, U.S. | |
| 14 | Win | 14–0 | Doug Jones | KO | 6 (10), 2:28 | February 21, 1967 | Convention Hall, Philadelphia, Pennsylvania, U.S. | |
| 13 | Win | 13–0 | Eddie Machen | TKO | 10 (10), 0:22 | November 21, 1966 | Grand Olympic Auditorium, Los Angeles, California, U.S. | |
| 12 | Win | 12–0 | Oscar Bonavena | SD | 10 | September 21, 1966 | Madison Square Garden, New York City, New York, U.S. | |
| 11 | Win | 11–0 | Billy Daniels | RTD | 6 (10) | July 25, 1966 | Convention Hall, Philadelphia, Pennsylvania, U.S. | |
| 10 | Win | 10–0 | Al Jones | KO | 1 (10), 2:33 | May 26, 1966 | Grand Olympic Auditorium, Los Angeles, California, U.S. | |
| 9 | Win | 9–0 | Chuck Leslie | KO | 3 (10), 2:47 | May 19, 1966 | Grand Olympic Auditorium, Los Angeles, California, U.S. | |
| 8 | Win | 8–0 | Don Smith | KO | 3 (10), 1:09 | April 28, 1966 | Civic Arena, Pittsburgh, Pennsylvania, U.S. | |
| 7 | Win | 7–0 | Charley Polite | TKO | 2 (10), 0:55 | April 4, 1966 | Hotel Philadelphia Auditorium, Philadelphia, Pennsylvania, U.S. | |
| 6 | Win | 6–0 | Dick Wipperman | TKO | 5 (8), 2:58 | March 4, 1966 | Madison Square Garden, New York City, New York, U.S. | |
| 5 | Win | 5–0 | Mel Turnbow | KO | 1 (8), 1:41 | January 17, 1966 | Convention Hall, Philadelphia, Pennsylvania, U.S. | |
| 4 | Win | 4–0 | Abe Davis | KO | 1 (8), 2:38 | November 11, 1965 | Philadelphia Auditorium, Philadelphia, Pennsylvania, U.S. | |
| 3 | Win | 3–0 | Ray Staples | TKO | 2 (6), 2:06 | September 28, 1965 | Convention Hall, Philadelphia, Pennsylvania, U.S. | |
| 2 | Win | 2–0 | Mike Bruce | TKO | 3 (6), 1:39 | September 20, 1965 | Convention Hall, Philadelphia, Pennsylvania, U.S. | |
| 1 | Win | 1–0 | Woody Goss | TKO | 1 (6), 1:42 | August 16, 1965 | Convention Hall, Philadelphia, Pennsylvania, U.S. | |