Bass went down clutching his leg and was helped to the locker room after play was stopped on a foul by Jameer Nelson. Bass, in his sixth season out of LSU, rolled his ankle when he landed on Zach Randolph's left foot as he came down from a jump shot.
Memphis led 76-68 at the time.
Bass averages 11.1 points and 5.7 rebounds for Orlando. He had 13 points and three rebounds at the time of the injury.