Blake Griffin sits out practice because of bone bruise in knee

Clippers All-Star forward Blake Griffin suffered a bone bruise in his left knee during Wednesday night’s intrasquad scrimmage at the Galen Center.

The team said Griffin had a precautionary MRI exam after the scrimmage that showed no structural damage to the knee.

Clippers Coach Doc Rivers said Griffin had “tweaked” his knee.

Griffin didn’t practice Thursday and there was no timetable for his return. However, he was dressed in his practice gear and shot free throws flat-footed when the media were allowed in before practice.

Griffin was injured while driving for a dunk attempt when he was fouled by Lou Admundson. Griffin fell hard on the court and stayed on his back briefly before getting up to shoot two free throws.

The Clippers practice Friday before they leave for an exhibition game in Utah against the Jazz on Saturday night.

“Blake hurt his knee, but it was nothing bad,” Rivers said before the team practiced Thursday. “But he tweaked it. It was on the dunk attempt. He said he did it going up. So he’s out.”

Griffin’s injury is on the same knee on which he had a non-displaced stress fracture of his left patella that forced him to miss his entire rookie season (2009-10) after he had surgery.

Rivers then went down his list of injured players who were unable to practice. J.J. Redick was out with a bruised left quad, Matt Barnes has a sore left calf and rookie Reggie Bullock has a sore right knee.

“So I think I may practice today,” Rivers joked.

Paul’s role

Chris Paul has been told to be more aggressive on offense, to attack when he sees an opening rather than wait.

“I’ve played about every different way possible,” Paul said. “Obviously we played a certain way the past couple of years. But it’s cool to see that we’re capable of switching this thing up.”

Paul said the team still is learning how to play together under the new system that’s being installed by Rivers and associate head coach Alvin Gentry, who is in charge of the offense.

“A lot of it is reads,” Paul said. “So we’re all still trying to get the timing down, trying to be as efficient as possible.”

broderick.turner@latimes.com

Twitter: @BA_Turner