Spud Webb, at 5 feet 7 the NBA's shortest player, got two dunks while scoring 14 points in the third quarter and helped the Atlanta Hawks beat the Los Angeles Lakers, 102-93, last night before a capacity crowd of 16,522 in Atlanta.

The Hawks had lost 12 straight to the Lakers since Dec. 19, 1979.

The Hawks padded a 53-52 halftime lead by scoring the first eight points of the third quarter. The Lakers got within 72-71, but Webb's six points -- one on a dunk -- made it 82-75 by the end of the quarter.

He finished with 23 points and 13 assists. Cavaliers 124, Spurs 114

World B. Free, who had missed two games with a sore leg, scored 31 points in the victory in Richfield, Ohio. Teammate John Bagley had 24 points and 11 assists.

Free made his third three-point shot of the game and followed with a three-point play to give Cleveland a 107-97 advantage with 5:17 to go. Rockets 110, Mavericks 105

In Houston, Ralph Sampson scored 28 points but it was John Lucas' four foul shots in the last nine seconds that clinched the victory over Dallas.

Jay Vincent put the Mavericks ahead, 105-103, with 42 seconds left. Robert Reid's fallaway jumper tied it, but he missed an accompanying foul shot. When Sampson rebounded, James Donaldson fouled him. Sampson's foul shot put Houston ahead for good with 22 seconds to go.

Then Lucas clinched the victory.

Vincent, who scored 31 points, made 12 of his team's points consecutively at one point.

Dallas Coach Dick Motta was ejected with 8:12 to go in the first quarter when he got two technical fouls from referee Dick Bavetta. Nuggets 119, Trail Blazers 113

Alex English scored 32 points, pacing Denver to its fifth straight victory and handing the Trail Blazers their 10th consecutive loss.

It was Portland's 13th loss in 14 games and fifth straight at home, tying a club record. The 10-game losing streak is the longest in the NBA this season.

Portland tied with 5:15 left when Jim Paxson stole a pass and drove the length of the court for a lay-up. Denver responded with two jump shots by center Danny Schayes and never trailed again.

Mychal Thompson led Portland with 23 points. Kiki Vandeweghe had 22, but none in the fourth quarter. Pistons 110, Bulls 100

In Pontiac, Mich., Kelly Tripucka scored a season-high 41 points and Isiah Thomas had 33 to lead Detroit over Chicago, which lacked four starters.

The victory, Detroit's eighth straight, extended its club-record home winning streak to 12 games.

Tripucka scored 10 of the Pistons' first 12 points in the second half, and their 11-4 spurt opened a 75-67 lead.

Detroit outscored Chicago by 14-8 in the first seven minutes of the fourth quarter and led by 100-90 after Earl Cureton made two foul shots.