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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
(October 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 | -- | -- | 124 days |
| Johnny Powers [2] | Apr 15, 1969 | -- | -- | 67 days |
| Hans Schmidt | Jun 21, 1969 | -- | -- | 7 days |
| Johnny Powers [3] | Jun 28, 1969 | -- | -- | 20228 days |
North American Heavyweight Championship
(Late 1970—March 1974)
| Won By: | Date: | Event: | Location: | Reign: |
|---|---|---|---|---|
| Stan Stasiak | Jul 6, 1974 | Live Event | New Castle, USA | 45 days |
North American Heavyweight Championship
(October 1974-Late 1977)
| Won By: | Date: | Event: | Location: | Reign: |
|---|
North American Heavyweight Championship
(January 1979—April 23, 1981)
| Won By: | Date: | Event: | Location: | Reign: |
|---|