Jim O'Brien quit as coach of the Celtics on Tuesday, after half a season under new boss Danny Ainge. Ainge said O'Brien told him he wanted to resign at a meeting Tuesday morning, one of their regularly scheduled sit-downs to discuss "philosophical differences" on running the team.
"The philosophical differences, I thought, were much smaller than Jim thought," said Ainge, the team's director of basketball operations.
Assistant coach John Carroll will take over for the rest of the season, Ainge said. Another assistant coach, Dick Harter, was let go. Ainge said that he took a more long-term view of building the team, while O'Brien was more concerned with short-term results.
"Jim did not see that long-term vision that I saw," Ainge said.
HORNETS: Jamal Mashburn (knee surgery) was activated and will play make his season debut tonight against the Bucks.
LAKERS: Shaquille O'Neal (strained right calf) went through a light practice and might play tonight. Kobe Bryant (sore right shoulder) did not practice for the second straight day. He plans to play tonight. Karl Malone (right knee) is expected to miss another nine games.
PACERS: Forward Ron Artest (sprained thumb) is day to day.
ROOKIE CHALLENGE: LeBron James and Carmelo Anthony head the roster of first-year players who will face second-year players, including Amare Stoudemire and Yao Ming, during All-Star weekend in Los Angeles. For the first time, the league is requiring players chosen for this game and the All-Star game to play in both.