Boxing in the 1950s and Floyd Patterson emerged as the youngest heavyweight champion in history (coincidentally, he beat Moore for the title left vacant by Marciano). Patterson remained the youngest heavyweight champion in history until November 22, 1986, when a 20-year-old Mike Tyson defeated the 31-year-old WBC Heavyweight Champion Trevor Berbick by TKO in round 2. The dark side of boxing once again emerged: Jake LaMotta alleged at a hearing that he had thrown a fight with Billy Fox in exchange for a try at the world Middleweight title, and Jim Norris, an important promoter of the time, was associated with Blinky Palermo and
Light heavyweight heavyweight division and became undisputed champion of the latter two. Dariusz Michalczewski holds the record for most consecutive title defenses at this division, with 23 defenses of the WBO title. Current champions Below is a list of longest reigning light heavyweight champions in boxing measured by the individual's longest reign. Career total time as champion (for multiple time champions) does not apply. In MMA, the light heavyweight division is from 186 lbs (84 kg) to 205 lb (93 kg). Light heavyweight Light heavyweight, or junior cruiserweight, is a weight class in combat sports. In amateur boxing, light heavyweight is a