The lightweight division in

mixed martial arts Mixed martial arts (MMA), sometimes referred to as cage fighting, no holds barred (NHB), and ultimate fighting, and originally referred to as Vale Tudo is a full-contact combat sport based on strike (attack), striking, grappling and ground f ...

contains different weight classes: * The UFC's lightweight division, which groups competitors within 146 to 155 lb (66 to 70 kg) * The

Shooto Shooto is a combat sport and mixed martial arts organization that is governed by the ''Shooto Association'' and the ''International Shooto Commission''. Shooto was originally formed in 1985, first as a particular fighting system and then in 198 ...

lightweight division, which limits competitors to 145 lb (65.8 kg) *The

ONE Championship ONE Championship (formerly ONE Fighting Championship) is a Singaporean combat sports promotion. Founded on 14 July 2011 by entrepreneur Chatri Sityodtong and former ESPN Star Sports senior executive Victor Cui, its events have featured mixe ...

's lightweight division, with an upper limit at *The Road FC's lightweight division, with an upper limit at 154 lb (70 kg)

Ambiguity and clarification

For the sake of uniformity, most American mixed martial arts media outlets consider Lightweight competitors to be between 146 and 155 lb (66 and 70 kg). This encompasses The Shooto Welterweight division (154 lb / 70 kg). The UFC's lightweight division was reinstated at ''

UFC 58 ''UFC 58: USA vs. Canada'' was a mixed martial arts event held by the Ultimate Fighting Championship on March 4, 2006. It was held at the Mandalay Bay Events Center on the Las Vegas Strip in Nevada, and broadcast live on pay-per-view in the Unite ...

'' after falling into disuse following '' UFC 49''. Sean Sherk, a former

welterweight Welterweight is a weight class in combat sports. Originally the term "welterweight" was used only in boxing, but other combat sports like Muay Thai, taekwondo, and mixed martial arts also use it for their own weight division system to classify the ...

contender, defeated Kenny Florian at ''

UFC 64 The Ultimate Fighting Championship (UFC) is an American mixed martial arts (MMA) promotion company based in Las Vegas, Nevada. It is o