Howard has not played since Nov. 17 due to a knee injury. On Nov. 20, the veteran underwent platelet-rich plasma therapy on his knee, which separates the plasma from a sample of the patient's blood before re-injecting it into the injured tissue.
McHale said Rockets forward Kostas Papanikolaou will not be back anytime soon, either. Papanikolaou has a Grade 1 knee sprain.
Houston guard Isaiah Canaan is currently out with a sprained ankle, while forward Terrence Jones is out indefinitely with a nerve issue.
Howard was averaging 18.8 points and 11.3 rebounds per game in 10 games before the injury. Houston has gone 7-2 in Howard's absence and is 16-4 on the season.
The Rockets play the Golden State Warriors on Wednesday.
- Molly Geary