A former cruiserweight king, Haye moved up to wrench the WBA title from the titanic Nikolai Valuev on a close 12-round decision in 2009.
- Bermane Stiverne (85)
Stiverne stopped Chris Arreola in six rounds to win the vacant WBC title in 2014, in his 26th fight.
- Mike Tyson (76)
The unbeaten wrecking ball became the youngest heavyweight champion in history when he demolished WBC champion Trevor Berbick in two rounds.
6 = Charles Martin (74)
Martin’s farcical IBF world title win came in January when his opponent, Vyacheslav Glazkov, suffered a freak knee injury in the third round.
6 = Ray Mercer (74)
Seventeen fights into his career, Mercer came from behind to break WBO champion Francesco Damiani’s nose and stop him in the ninth round of their 1991 clash.
- Deontay Wilder (69)
Having blitzed all other opponents, Wilder went the distance for the first time when he outpointed WBC champion Bermane Stiverne in his 33rd outing.
- Vitali Klitschko (50)
Although it was his 25th fight, Klitschko had walked through anyone he had faced before he stopped WBO champion Herbie Hide in 1999.
- Michael Bentt (47)
Bentt stunned WBO world champion Tommy Morrison in 1993 by stopping him inside a round. It was Bentt’s 12th and penultimate fight.
- Leon Spinks (46)
Spinks upset Muhammad Ali for the WBC and WBA baubles in 1978, outpointing the legend over 15 rounds in his eighth fight.
- Anthony Joshua (34)
In just his 16th pro outing, the Olympic champion blitzed Charles Martin in two rounds to lift the IBF crown.