The Rockets will be without Chuck Hayes for two-to-four weeks after he sprained his right ankle in practice Thursday.

Hayes had an MRI and an X-ray that showed a "moderate to severe" sprain, according to the team.

He has started 20 games at center in place of the injured Yao Ming, averaging six points, 5.9 rebounds and 21.5 minutes.

Houston is expected to replace him in the starting lineup with either Brad Miller or Jordan Hill.