Washington junior welterweight Simon Brown extended his undefeated record to 12-0 last night with a first-round knockout of journeyman Ruby Ortiz at Prince George's Community College.

A left hook to the body sent Ortiz sprawling through the ropes and he was counted out at 2:08 of the first round in the feature of an otherwise highly competitive six-bout pro boxing card. A crowd of 355 was on hand.

Brown, 19, simply outclassed Ortiz, whose record fell to 26-8-3. Brown's hand and foot speed combined to dazzle the clumsier New Yorker, who never landed a punch in the bout.

It was Brown's first pro bout in his home area after 11 straight wins at Atlantic City and the first opportunity for his mother, Eva, to see her son at work. She was beaming.

"He's so quiet and very humble at home," she said. "You wouldn't believe he could be like this."

Brown stung Ortiz with a combination about a minute into the round and had him against the ropes, obviously hurt. But it took another minute before Brown caught up with Ortiz again on the other side of the ring where the finishing blows were landed.

Earlier, light heavyweight Mike Lee of Laurel won a split decision over Charles Price of the District in a closely contested six-round bout and middleweight Ray Carroll of Baltimore defeated Dexter Mason of the District, also by split decision.

Except for a phantom knockdown of Price, Brown's knockout of Ortiz in the final fight of the evening was the only time a fighter hit the canvas.

Promoter Hal Sullivan, who arranged the card, said he was not surprised by the small turnout and it did not dampen his intention to continue putting on pro boxing shows in Prince George's County. "It was a good card, and that's what counts," he said.

And up until the mismatch in the final bout, he was right.