Lloyd (Honeyboy) Taylor scored a surprising fourth-round technical knockout to defeat Magic Shannon for the Leonard Bee Tri-State welterweight championship last night at Prince George's Community College.

The fight, before more than 600 people at Novak Field House, was sponsored by Kenny Leonard, brother of retired welterweight champion Sugar Ray Leonard. It was scheduled for 10 rounds, but Taylor came out in the fourth and stunned Shannon with a series of combination punches. Taylor open a cut on Shannon's left eye before flooring him at 2:15.

Taylor, a native of Washington, now is 16-1 with 13 knockouts. Shannon, of Portsmith, Va., suffered his first defeat after winning his first 12 bouts. He has 10 knockouts.

"I'm very happy with the turnout and I'm very happy with the card we were able to give these people. Things turned out much better than I expected," said Leonard, who plans to stage another card Sept. 24, possibly in Columbia, Md.

Leonard added that he plans to take Taylor to other parts of the country in the next few months.

The eight-round cofeature was a disappointment, however, as David Grayton scored a second-round technical knockout over Darryl Richardson.

Grayton, of Hyattsville, Md., floored Richardson at 2:48 with a left-right-left combination, ending the fight much sooner than expected.

In preliminary bouts, Al Martino of Hillcrest Heights won his first professional fight, unanamously over Rick Carey.

Gary Tibbs and Fenton Hill fought to a draw; Ray Carroll won a split decision six-rounder over Tony Ojoe, and Aaron Evans scored a technical knockout over Curtis Roach at 1:47 of the second round.