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National Wrestling Alliance - Buffalo/Cleveland
North American Heavyweight Championship
(April 1968 — Late 1970)
National Wrestling Federation
North American Heavyweight Championship
(Late 1970—March 1974)
Super Pro-Wrestling
International Wrestling Association
North American Heavyweight Championship
(April 1974-Late 1977)
New Japan Pro Wrestling
National Wrestling Federation
North American Heavyweight Championship
(January 1979—April 23, 1981)
North American Heavyweight Championship
(April 1968 — Late 1970)
| Won By: | Date: | Event: | Location: | Reign: |
|---|---|---|---|---|
| Johnny Powers | Apr 1968 | -- | -- | |
| Moose Cholak | Apr 21, 1968 | -- | -- | 235 days |
| Antonino Rocca | Dec 12, 1968 | -- | -- | |
| Johnny Powers [2] | Apr 1969 | -- | -- | |
| Hans Schmidt | Jun 21, 1969 | -- | -- | 7 days |
| Johnny Powers [3] | Jun 28, 1969 | -- | -- | |
| Dr. Death | Jul 1969 | -- | -- | |
| Johnny Powers [4] | Aug 30, 1969 | -- | -- | 124 days |
| Bulldog Brower | Jan 1, 1970 | Live Event | Cleveland, USA | 94 days |
| Johnny Powers [5] | Apr 5, 1970 | -- | -- | 88 days |
| Bulldog Brower [2] | Jul 2, 1970 | Live Event | Cleveland, USA | 156 days |
North American Heavyweight Championship
(Late 1970—March 1974)
| Won By: | Date: | Event: | Location: | Reign: |
|---|---|---|---|---|
| Ernie Ladd | Dec 5, 1970 | Live Event | Akron, USA | 117 days |
| Johnny Powers [6] | Apr 1, 1971 | Live Event | Cleveland, USA | 63 days |
| Waldo Von Erich | Jun 3, 1971 | Live Event | Cleveland, USA | 168 days |
| Johnny Powers [7] | Nov 18, 1971 | Live Event | Cleveland, USA | 288 days |
| Johnny Valentine | Sep 1, 1972 | Live Event | Cleveland, USA | 83 days |
| Johnny Powers [8] | Nov 23, 1972 | Live Event | Cleveland, USA | 86 days |
| Eric The Red | Feb 17, 1973 | Live Event | Akron, USA | 77 days |
| Johnny Powers [9] | May 5, 1973 | Live Event | Cleveland, USA | 42 days |
| J.B. Psycho | Jun 16, 1973 | Live Event | Akron, USA | 8 days |
| Johnny Powers [10] | Jun 24, 1973 | Live Event | Akron, USA | 221 days |
| Ernie Ladd [2] | Jan 31, 1974 | Live Event | Cleveland, USA | |
| Ox Baker | Feb 1974 | -- | -- | |
| Ernie Ladd [3] | Mar 14, 1974 | -- | -- | 4 days |
| Johnny Powers [11] | Mar 18, 1974 | -- | -- | 28 days |
International Wrestling Association
North American Heavyweight Championship
(April 1974-Late 1977)
| Won By: | Date: | Event: | Location: | Reign: |
|---|---|---|---|---|
| Dominic DeNucci | Apr 1974 | -- | -- | |
| George Steele | May 31, 1974 | Live Event | Pittsburgh, USA | |
| Dominic DeNucci [2] | Jun 1974 | -- | -- | |
| Stan Stasiak | Jul 6, 1974 | Live Event | New Castle, USA | 45 days |
| Ox Baker [2] | Aug 20, 1974 | Live Event | Atlanta, USA | 7 days |
| Ernie Ladd [4] | Aug 27, 1974 | Live Event | Atlanta, USA | 62 days |
| Tarzan Tyler | Oct 28, 1974 | -- | -- | 70 days |
| Ox Baker [3] | Jan 6, 1975 | -- | -- | |
| ** Vacated ** | May 1975 | -- | -- | |
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After Baker leaves the promotion.
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| Bulldog Brower [3] | Jul 1975 | -- | -- | |
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Still recognized as champion in August 1977.
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National Wrestling Federation
North American Heavyweight Championship
(January 1979—April 23, 1981)
| Won By: | Date: | Event: | Location: | Reign: |
|---|---|---|---|---|
| Johnny Powers [12] | Jan 1979 | -- | -- | |
|
Recognized as champion on tour in Japan.
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| Seiji Sakaguchi | Jan 26, 1979 | New Year Golden… | Okayama, Japan | 238 days |
| Tiger Jeet Singh | Sep 21, 1979 | Bloody Fight Se… | Sendai, Japan | 580 days |
| ** Deactivated ** | Apr 23, 1981 | -- | -- | |
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After the announcement of the I.W.G.P.
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