Olympic silver medalist Willie DeWit, a promising heavyweight from Canada, was knocked down in the first round of his fight with Alex Williamson but recovered to earn a draw in the best match of the three-bout undercard that preceded the Marvelous Marvin Hagler-Thomas Hearns middleweight championship bout.

In the first round, Williamson, a former Canadian champion now working out of Miami as a member of trainer Angelo Dundee's stable of fighters, showed terrific strength when he dropped DeWit with a left hook. The tall, slender redhead surprised everyone in the house, including DeWit, who picked himself off the floor just as the bell rang to end the round. Williamson continued his assault in the second round, although DeWit landed several good right hands.

The third opened with DeWit on the offensive, but Williamson deflected most of the punches and countered with good left jabs. By the fifth, both men still appeared strong.

Williamson opened a hairline cut over DeWit's left eye in the fifth. But DeWit took control of the round by landing a right to Williamson's chin. Williamson staggered, regained his balance and hustled back into the action, fighting courageously.

DeWit scored with a short right hand in the middle of the final round. Williamson was exhausted and had a hard time finding the soul to finish with any power, but the memory of his early effort was more than enough to sustain him.

In the night's most unspectacular preliminary, light heavyweight Ricky Womack, a member of Emanuel Steward's Kronk Gym in Detroit, won a six-round unanimous decision over David Vedder of San Jose. Womack is 4-0, Vedder 2-2-1.

In another featured undercard bout, featherweight Andy Minsker stopped John Watkins of Los Angeles with more than two minutes remaining in the fourth round of a scheduled six-round bout. Minsker upped his record to 4-0 and scored his first knockout. Watkins' record dropped to 5-5-1.