Howard started at center for the Lakers against Cleveland on Sunday night as Los Angeles attempted to end its six-game losing streak.
Howard apparently tore the labrum in his shoulder earlier this month during a game against the Clippers, and he aggravated the injury last Sunday while grabbing a career high-tying 26 rebounds against Denver. He sat out for the past week to rest the injury.
Howard is averaging 17.3 points and 12.4 rebounds per game in his first season with the struggling Lakers, who are on their worst skid in six years.
Pau Gasol missed his fourth straight game for Los Angeles with a concussion.