PISMO BEACH, Calif. -- Undefeated Brian Viloria stopped Luis Doria of Colombia in the first round to retain his World Boxing Council Youth World flyweight title on Tuesday night.

Viloria, 21, of Waipahu, hurt Doria with the first punch of the 10-round bout and floored him twice with right hands before referee Lou Moret stopped the fight at 1:14.

Viloria, who was a former U.S. Olympian nicknamed "Hawaiian Punch,'' improved his record to 13-0 with 8 KOs. He won the title in June 2002 against Francisco Soto.

Doria, 31, drops to 17-9-1 with 11 KOs.

Both men weighed the division limit of 112 pounds for the fight, which took place on the sand in front of the Sea Venture Hotel.