Al Horford didn't play in Atlanta's game against Washington on Saturday night because of a lower back injury.

He sustained the injury on Friday night when Blake Griffin fouled him hard on a drive to the basket. Horford was OK with the foul, which was called a flagrant foul 1.

"It wasn't a dirty play or anything," Horford said. "He was making a play on the ball, so you can't fault him for that."

He is averaging 16.2 points and 9.9 rebounds this season.