Mo Williams took a knock on his left shoulder in the exhibition opener Tuesday, but the Milwaukee Bucks point guard wasn't too concerned.

Still, he sat out the game Wednesday at Utah as a precautionary measure, before returning to the practice floor Thursday at the Cousins Center.

"I'm just being cautious with it," said Williams, who injured the same shoulder in a collision with Denver Nuggets forward Linas Kleiza last January. "The regular season is when it counts."

Williams felt a few twinges of pain when he bumped into Chicago's Viktor Khryapa in the first half on Tuesday in La Crosse. Williams returned briefly in the third quarter before sitting out the rest of the game.