Brandan Wright sprained his right ankle late in Tuesday's win over the 76ers, when his playing time increased because a strained groin sidelined Elton Brand. Wright and Brand are both considered game-time decisions for Thursday night.
The Mavs are still awaiting MRI results to determine the severity of point guard Derek Fisher's strained patellar tendon in his right knee.
"I'm assuming he's not going to play tomorrow," coach Rick Carlisle said. "I think that's a pretty safe bet."