Heavyweight champion tum 2 ni nawn thei hi boxer pathum an awm a, chung mite chu Muhammad Ali (USA), Evander Holyfield (USA) leh Lennox Lewis (UK) te an ni.

Ali hian ni 25 February, 1964 khan Sonny Liston (USA) hnehin a title hmasa ber a la a, George Foreman (USA) chu October ni 30, 1974 a hneh leh bawk. WBA title pawh Leon Spinks (USA) hnen atangin 1978 September ni 15 khan a la bawk. Spinks hi kum tir lam February ni 15, 1978 khan a lo hneh tawh lo a ni. 

Holyfield hian a title hmasa ber chu 1990 October khan James Douglas (USA) hnehin a la a, WBA leh IBF champion ni kawp turin Riddick Bowe (USA) chu November 1993 khan hnehin a la kawp a, WBA title bik hi November ni 9, 1996-a boxer rothap Mike Tyson a hneh tum khan a kawl leh bawk. 

Lennox Lewis hian Riddick Bowe hnehin January 1993 khan WBC title a hreng tan a, ni 7 February, 1995-ah Oliver McCall (USA)  hnehin WBC title a kawl leh a, WBC, IBF leh IBO title kawl kim turin 2001 Noovember ni 17 khan Hasim Rahman (USA) a hneh leh.