San Antonio Spurs coach Gregg Popovich, walking the sidelines in the first half of Tuesday's game, yelled a question to Indiana Pacers coach Rick Carlisle: Who is playing center?

Carlisle looked on the court, looked at Popovich and shrugged his shoulders.

Rick Carlisle's three centers -- Jeff Foster, David Harrison and Scot Pollard -- were on the bench in street clothes along with Jermaine O'Neal.

The lack of healthy bodies has hurt the Pacers' chemistry on the court in the preseason. Foster (Achilles) and Pollard (calf) are expected to miss the start of the regular season. Harrison is out at least another week.

"We're still doing a lot of things we wanted to do, but when you don't have three 7-footers out there to go through stuff, it makes it hard," Carlisle said. "We have to roll with it and hope we can get guys back as quickly as possibly but not rush them back."