Celtics reserve forward Brian Scalabrine will have more tests to determine the effects of concussions that have bothered him for the last month.

"I've had some very challenging days," Scalabrine said on Sunday. "Am I concerned about it? Well, yeah. It's my career, my life."

He has had five concussions in his life, with three coming this year, and he has missed 12 of Boston's last 15 games.

"We're just going to be very careful with him," Celtics coach Doc Rivers said. "I'm pretty scared. I don't know anything about it, but I know enough to be scared. We really don't know enough about it in any league."