Juan Manuel Marquez of Mexico poses after his 11th-round technical knock out over Joel Casamayor of Cuba at the MGM Grand Garden Arena in Las Vegas on Saturday night. Marquez, fighting for the first time at the 135-pound weight class, claimed the Ring Magazine Lightweight crown with the victory. View photo »

Lightweight boxer Juan Manuel Marquez of Mexico (left) connects with Joel Casamayor of Cuba during a lightweight fight at the MGM Grand Garden Arena. View photo »

Lightweight boxer Juan Manuel Marquez is treated in his corner during a boxing match against Joel Casamayor of Cuba at the MGM Grand Garden Arena. View photo »

Lightweight boxer Joel Casamayor of Cuba is treated after losing to Juan Manuel Marquez of Mexico during a boxing match at the MGM Grand Garden Arena. Marquez opened up a nasty cut above Casamayor's right eye in the fifth, and later delivered a technical knockout in the 11th. View photo »

Lightweight boxer Joel Casamayor of Cuba, left, takes a big punch from Juan Manuel Marquez of Mexico during their lightweight title fight Saturday night at the MGM Grand Garden Arena in Las Vegas. Marquez knocked out Casamayor in the 11th round to claim the Ring Magazine crown. View photo »

Lightweight boxer Juan Manuel Marquez, right, of Mexico celebrates after knocking out Joel Casamayor of Cuba during the 11th round of their lightweight title match at the MGM Grand Garden Arena Saturday. View photo »

Boxers Ricky Hatton (left) and Oscar De La Hoya share a conversation before the Joel Casamayor versus Juan Manuel Marquez title fight at the MGM Grand Garden Arena in Las Vegas on Saturday night. View photo »

New Mexico governor Bill Richardson takes in the Joel Casamayor-Juan Manuel Marquez lightweight title fight at the MGM Grand Garden Arena in Las Vegas Saturday night. Richardson was one of many Latinos in attendance celebrating the Mexican Independence Day Weekend's traditional big boxing match. View photo »

Vernon Forrest (right) of Atlanta connects on WBC super welterweight champion Sergio Mora of Los Angeles during their title rematch at the MGM Grand Garden Arena Saturday night. Forrest reclaimed his title with a 12-round unanimous decision. View photo »

Vernon Forrest of Atlanta celebrates with fans after his victory over WBC super welterweight champion Sergio Mora of Los Angeles during their title rematch at the MGM Grand Garden arena. Forrest regained the title he had lost to Mora from a fight in June with a 12-round unanimous decision. View photo »

U.S. boxer Victor Ortiz celebrates his victory over Roberto Arrieta of Argentina during their NABO junior welterweight fight at the MGM Grand Garden Arena Saturday. Golden Boy promoter Oscar De La Hoya praised the young boxer before and said Ortiz will be the next great champion. View photo »