Some 30 seconds into their matchup with the Oklahoma City Thunder, the Dallas Mavericks are down a center when Brendan Haywood went down with what appeared to be some sort of ankle or leg injury.

Brendan Haywood out and headed to the locker rom 30 seconds into OKC-Dallas with what looked like an ankle injury.

— Chris Mannix (@ChrisMannixSI) March 6, 2012

Dallas has been bit by the injury bug of late particularly in the front court where they lost Brendan Wright earlier this week to injury.

With Wright out, the Mavericks called up Sean Williams from the D-League on Sunday night to provide some added depth in the front-court, and he may be pressed into action if Haywood can't return to the game.

Ian Mahinmi checked into the game in place of Haywood who immediately headed to the locker room to be examined by the Mavericks' training staff.

Haywood's return to the game is questionable.