| 1 | 504 days | Al Costello | 3 | 21.07.1960 - 08.08.1960, 24.08.1960 - 19.11.1960, 08.12.1960 - 11.01.1962 | | |
| 2 | 416 days | Antonio Pugliese | 2 | 21.02.1966 - 22.09.1966, 08.12.1966 - 29.06.1967 | | |
| 3 | 11 days | Arnold Skaaland | 1 | 29.06.1967 - 10.07.1967 | 6.58 | 18 |
| 4 | 77 days | Baron Mikel Scicluna | 1 | 22.09.1966 - 08.12.1966 | 6.64 | 10 |
| 5 | 200 days | Bill Miller | 1 | 05.08.1965 - 21.02.1966 | | |
| 6 | 119 days | Bill Watts | 1 | 08.04.1965 - 05.08.1965 | 8.38 | 23 |
| 7 | 175 days | Bob Ellis | 1 | 11.01.1962 - 05.07.1962 | | |
| 8 | <1 day | Bruno Sammartino | 1 | 24.07.1967 - xx.xx.1967 | 9.34 | 216 |
| 9 | 182 days | Brute Bernard | 1 | 16.05.1963 - 14.11.1963 | | |
| 10 | 70 days | Buddy Austin | 1 | 07.03.1963 - 16.05.1963 | | |
| 11 | 264 days | Buddy Rogers | 2 | 19.11.1960 - 08.12.1960, 05.07.1962 - 07.03.1963 | 9.46 | 84 |
| 12 | <1 day | Chris Tolos | 1 | 28.12.1963 - xx.02.1964 | | |
| 13 | 200 days | Dan Miller | 1 | 05.08.1965 - 21.02.1966 | | |
| 14 | 167 days | Don Curtis | 2 | xx.xx.1958 - 04.09.1958, 11.12.1958 - 27.05.1959 | | |
| 15 | <1 day | Don McClarity | 1 | xx.02.1964 - 20.03.1964 | | |
| 16 | 426 days | Dr. Jerry Graham | 5 | 04.09.1958 - 11.12.1958, 27.05.1959 - xx.08.1959, 14.11.1959 - xx.03.1960, xx.03.1960 - 02.04.1960, 16.04.1960 - 23.04.1960, 20.03.1964 - 04.02.1965 | | |
| 17 | 105 days | Eddie Graham | 4 | 04.09.1958 - 11.12.1958, 27.05.1959 - xx.08.1959, xx.03.1960 - 02.04.1960, 16.04.1960 - 23.04.1960 | 9.17 | 11 |
| 18 | 63 days | Gene Kiniski | 1 | 04.02.1965 - 08.04.1965 | 8.00 | 9 |
| 19 | 163 days | Gorilla Monsoon | 2 | 14.11.1963 - 28.12.1963, 08.04.1965 - 05.08.1965 | 9.08 | 126 |
| 20 | 70 days | Great Scott | 1 | 07.03.1963 - 16.05.1963 | | |
| 21 | <1 day | John Tolos | 1 | 28.12.1963 - xx.02.1964 | 7.10 | 9 |
| 22 | 245 days | Johnny Barend | 1 | 05.07.1962 - 07.03.1963 | | |
| 23 | 407 days | Johnny Valentine | 4 | 14.11.1959 - xx.03.1960, 19.11.1960 - 08.12.1960, 11.01.1962 - 05.07.1962, 21.02.1966 - 22.09.1966 | 7.75 | 7 |
| 24 | 44 days | Killer Kowalski | 1 | 14.11.1963 - 28.12.1963 | 8.30 | 59 |
| 25 | 14 days | Lou Albano | 1 | 10.07.1967 - 24.07.1967 | 8.04 | 67 |
| 26 | 119 days | Lou Bastien | 3 | 02.04.1960 - 16.04.1960, 23.04.1960 - 21.07.1960, 08.08.1960 - 24.08.1960 | | |
| 27 | 321 days | Luke Graham | 1 | 20.03.1964 - 04.02.1965 | | |
| 28 | 167 days | Mark Lewin | 2 | xx.xx.1958 - 04.09.1958, 11.12.1958 - 27.05.1959 | 7.69 | 12 |
| 29 | 119 days | Red Bastien | 3 | 02.04.1960 - 16.04.1960, 23.04.1960 - 21.07.1960, 08.08.1960 - 24.08.1960 | 7.20 | 9 |
| 30 | 504 days | Roy Heffernan | 3 | 21.07.1960 - 08.08.1960, 24.08.1960 - 19.11.1960, 08.12.1960 - 11.01.1962 | | |
| 31 | 182 days | Skull Murphy | 1 | 16.05.1963 - 14.11.1963 | | |
| 32 | 77 days | Smasher Sloan | 1 | 22.09.1966 - 08.12.1966 | | |
| 33 | 214 days | Spiros Arion | 2 | 08.12.1966 - 29.06.1967, 29.06.1967 - 10.07.1967, 24.07.1967 - xx.xx.1967 | | |
| 34 | 14 days | Tony Altimore | 1 | 10.07.1967 - 24.07.1967 | | |
| 35 | <1 day | Vittorio Apollo | 1 | xx.02.1964 - 20.03.1964 | | |
| 36 | 63 days | Waldo von Erich | 1 | 04.02.1965 - 08.04.1965 | | |
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Champion(s)