Bucks' forward Desmond Mason was scheduled to undergo a magnetic resonance imaging exam on his sprained left thumb this afternoon.

Mason suffered the injury in the second quarter of the Bucks' 102-89 loss to the Sacramento Kings on Wednesday night. It was uncertain when results of the test would be available.

Meanwhile, Coach Larry Krystkowiak continued to contemplate a change in his starting lineup. The Bucks have used the same starting five in all 25 games this season: Mason and Yi Jianlian at forwards, Andrew Bogut at center and Michael Redd and Mo Williams at guards.

"I'm kind of waiting to see what happens with the report on Des," Krystkowiak said after a light practice session at the Cousins Center. "We're going to shake something up, whether it's starting the game that way or playing a little bit different lineup. I think it's time to do that."