Manny Pacquiao

Manny Pacquiao's 62-8-2 record with 39 knockouts includes an unprecedented eight-division world title reign, the only boxer to achieve this feat. His southpaw speed and devastating power resulted in a 58% knockout ratio, overwhelming champions from flyweight to welterweight. Compared to Floyd Mayweather Jr.'s defensive approach, Pacquiao's aggression produced 39 knockouts versus Mayweather's 27 in 50-0. His 2009 destruction of Miguel Cotto earned the Fighter of the Year performance of the decade, a testament to his 40% body-punch accuracy that defined his career.