Earlier this season, he sat out 11 games after undergoing platelet-rich plasma therapy on his right knee in November.
In 32 games, Howard has averaged 16.3 points, 11.0 rebounds and 1.4 blocks while shooting 57.5 percent from the field. His streak of eight straight All-Star Game appearances was snapped last week.
Joey Dorsey has started the last four games in Howard's place, averaging 2.8 points and 3.8 rebounds in 16.0 minutes.
The Rockets are the No. 3 seed in the Western Conference with a 33-15 record. They host the Chicago Bulls on Thursday.
- Paul Palladino