Glen Davis knew something was wrong before his feet touched the ground. For most of the season he has been battling pain in his left knee, and as he went up for a game-capping dunk against Phoenix Wednesday night, he sensed that he would not have a happy landing. Davis hobbled off the court with the help of the team’s medical staff.

The Celtics are calling it a strained left patella tendon and Davis is scheduled to have an MRI Thursday. While he said he’s not concerned, he also acknowledged that his knees have been a problem this season.

“That’s why I don’t jump that high,” Davis said. “That’s why I missed that dunk [against Miami]. I can’t jump. My knees hurt.”

The Celtics won’t know the extent of Davis’ injury until the MRI, but the feeling in the locker room was that he would likely miss some time.

“It’s hard,” Kevin Garnett said. “We’re back to this injury bug. Hopefully he’s not out for too long. Baby’s a trooper. He’s been playing hurt throughout this whole year and some last year.”