


The newly crowned Ring Magazine World Lightweight Champion, Juan Manuel Marquez TKO's former Ring Magazine World Lightweight Champion Joel Casamayor in the 11th round on Saturday, September 13, 2008 at MGM Grand Garden Arena.
Juan Manuel Marquez, a three time world champion won his debut in lighweight against Joel Casamayor via knockout in the late 11th round. Marquez went on the attack in the final minute of the 11th, first flooring Casamayor with a right hand to the chin. Marquez was relentless after that, landing several big blows before a glassy-eyed Casamayor went down for good on consecutive right hands with about 7 seconds left.
Joel Casamayor a Barcelona Olympic gold medalist holds none of the major title belts, but has beaten both the late Corrales and Nate Campbell, who holds the other three 135-pound title belts.
Marquez (49-4-1, 36 KOs) moved up to lightweight in hopes of landing a third bout with Manny Pacquiao after going 0-1-1 against the Filipino pound-for-pound king. Marquez proved the extra five pounds didn't bother him in a comprehensive win over Casamayor (36-4-1), the 37-year-old Cuban champion who has unofficially ruled the division since beating Diego Corrales two years ago.