Ali KO4 Moore - 26 years Briggs W12 Foreman - 23 years Patterson KO5 Moore - 21 years Morales KO11 Zaragoza - 19 years Moore D12 Pastrano - 19 years Foreman KO10 Moorer - 18 years Kovalev W12 Hopkins - 18 years Tyson KO4 Holmes - 17 years Hopkins W12 Pavlik - 17 years Hopkins W12 Dawson - 17 years Hopkins W12 Pascal - 17 years Dempsey KO3 Willard - 14 years Moore KO11 Durelle - 13 years Holyfield W12 Holmes - 13 years Holyfield W12 Foreman - 13 years Jones W12 McCallum - 13 years Taylor W12 Hopkins - 13 years Mayweather W12 Canelo - 13 years Toney W12 McCallum - 13 years Moore W10 Johnson - 11 years Dela Hoya KO8 Chavez - 11 years Dela Hoya W12 Camacho - 11 years Trinidad W12 Camacho - 11 years Mayweather KO8 Hernandez - 11 years Bradley W12 Marquez - 10 years Marquez KO9 Diaz - 10 years Pacquiao W12 Thurman - 10 years Salido W12 Lomachenko - 10 years Dela Hoya W12 Whitaker - 9 years Trinidad W12 Whitaker - 9 years Canelo W12 GGG - 8 years Hopkins KO9 Dela Hoya - 8 years Hopkins KO12 Trinidad - 8 years Lomachenko KO8 Rigondeaux - 8 years
Bob Fitzsimmons vs Bill Lang - 20 years Bob Fitzsimmons vs Jack Johnson - 15 years Bob Fitzsimmons vs Philadelphia Jack O'Brian - 15 years Bob Fitzsimmons vs George Gardner - 13 years Win over O'Brian is unbelievable, he beat 15 years younger prime HOF fighter in title defense.
