| No. | Won By | Won From | Location | Date |
|---|---|---|---|---|
| 1. | George Hackenschmidt | Tom Jenkins* | New York, NY | 5/4/05 |
| 2. | Frank Gotch | George Hackenschmidt | Chicago, IL | 4/3/08 |
| 3. | Joe Stecher | Charlie Cutler*(2) | Omaha, NE | 7/5/15 |
| 4. | Earl Caddock | Joe Stecher | Omaha, NE | 4/9/17 |
| 5. | Joe Stecher | Earl Caddock | New York, NY | 1/30/20 |
| 6. | Ed Lewis | Joe Stecher | New York, NY | 12/13/20 |
| 7. | Stanislaus Zbyszko | Ed Lewis | New York, NY | 5/6/21 |
| 8. | Ed Lewis | Stanislaus Zbyszko | Wichita, KS | 3/3/22 |
| 9. | Wayne Munn | Ed Lewis | Wichita, KS | 1/8/25 |
| 10. | Stanislaus Zbyszko | Wayne Munn | Philadelphia, PA | 5/15/25 |
| 11. | Joe Stecher | Stanislaus Zbyszko | St. Louis, MO | 5/30/25 |
| 12. | Ed Lewis | Joe Stecher | St. Louis, MO | 2/21/28 |
| 13. | Gus Sonnenburg | Ed Lewis | Boston, MA | 1/4/29 |
| 14. | Ed Don George | ??*(3) | Los Angeles, CA | 12/10/30 |
| 15. | Ed Lewis | Ed Don George | Los Angeles, CA | 4/13/31 |
| 16. | Danno O'Mahoney | Jim Londos*(4) | Boston, MA | 6/27/35 |
| 17. | Dick Shikat | Danno O'Mahoney | New York, NY | 3/2/36 |
| 18. | Ali Baba | Dick Shikat | Detroit, MI | 4/25/36 |
| 19. | Dave Levin | Ali Baba | Newark, NJ | 6/12/36 |
| 20. | Dean Detton | Ed Lewis*(5) | Philadelphia, PA | 9/29/36 |
| 21. | Bronko Nagurski | Dean Detton | Minneapolis, MN | 6/16/37 |
| 22. | Jim Londos | Bronko Nagurski | Philadelphia, PA | 11/18/38 |
| 23. | Lou Thesz | Baron Michele Leon*(6) | Los Angeles, CA | 5/21/52 |
| 24. | Whipper Billy Watson | Lou Thesz | Toronto, ON | 3/15/56 |
| 25. | Lou Thesz | Whipper Billy Watson | St. Louis, MO | 11/9/56 |
*Hackenschmidt won a series of tournaments, culmination with a victory over Jenkins, the American Heavyweight Champion, to become the World Heavyweight Champion.
*(2)Gotch retired without being defeated for the title. This match determined the new champion.
*(3)Sonnenburg was stripped of the title for failing to meet real contenders. This match determined the new champion.
*(4)Lewis vacated the title due to unknown circumstances. This match determined the new champion.
*(5)The title was vacated due to unknown circumstances. This was the final round of a tournament to crown a new champion.
*(6)Londos retired without being defeated. Thesz unified three titles to become Undisputed World Champion, culminating in a win over Leon, the recognized champion in Los Angeles.