The Washington Bullets signed Bill Blair as an assistant coach under newly hired Coach Kevin Loughery. Blair joins Fred Carter, who was an assistant to Gene Shue, who was fired Wednesday.

Blair had been a scout for the Indiana Pacers this season. He was Lougherty's aide with the Chicago Bulls 1983-85. Blair, 44, a native of Whitesburg, Ky., was an assistant to Larry Brown with the New Jersey Nets 1981-83.

*Celtics 126, Bulls 105: Larry Bird scored a game-high 32 points, Kevin McHale agreed to a multiyear contact extension, and the Celtics clinched the Atlantic Division title with their 23rd straight victory in Boston.

*Lakers 117, Spurs 109: Magic Johnson scored 27 points and Kareem Abdul-Jabbar 26 in the victory in San Antonio.

*Hawks 107, Mavericks 103: The lead changed 18 times in Dallas, the last time when Kevin Willis scored with 3:45 left.

*Suns 105, Pistons 103: The Suns blew an 88-72 lead in Phoenix but Walter Davis saved them by scoring 11 of his 25 points in the fourth quarter. He got the last four points.

Detroit's Isiah Thomas bounced a shot off the rim with three seconds left and Bill Laimbeer tried and failed four times to tap it in.

*Trail Blazers 115, SuperSonics 108: Kiki Vandeweghe's 36 points provided the victory in Portland, Ore.

*Nuggets 115, Clippers 104: At Denver, the Nuggets took a 10-0 lead, were never headed and are half a game behind first-place Houston in the Midwest.