For the first half Wednesday night, it looked as if the world-champion Portland Trail Blazers were on their way to another easy victory. The decision seemed even less in doubt after Indiana's John Williamson abruptly left the arena following an apparent disagreement with Pacer coach Bobby Leonard at halftime.

But Indiana, which had snapped a six-game losing streak Tuesday night by beating Buffalo, outscored Portland, 31-19, in the third quarter to take a two-point lead and held on to beat the Blazers, 111-104.

It was only the fifth victory of the season against eight losses for the Pacers, who were led by Dan Roundfield's game high 29 points, including 12 in the fourth quarter.

Recently acquired Johnny Neumann came off the bench in the final period and hit five for five to help spark the rally.

Leonard would not discuss Williamson's walkout. "It's strictly a team matter," he said.

Williamson averaged 20.8 points per game last season, second on the Indiana team to Billy Knight. He played 17 minutes Wednesday night and scored only four points.

Forward Adrian Dantley made up for the loss of Williamson by scoring 26 points in three periods for the Pacers.

Elsewhere: Celtics 131, Hawks 105

Boston won its third straight game and handed Atlanta its fourth defeat in a row, with rookie Credic Maxwell and Tom Boswell scoring 20 points apiece for the Celtics.