The Mavericks suspended center Brendan Haywood for Friday night's game against the Spurs for a violation of team rules.
Haywood will be eligible to face the Heat on Saturday night.
"I'm not going to expound it any more than that. It's going to remain an internal matter," Dallas coach Rick Carlisle said.
"The only thing that I'll say, in two-plus years here one of the things I've grown to respect and admire about [owner] Mark [Cuban] and his franchise is that everyone's treated great, but everyone's held to a high level of accountability, and we expect a lot. We're going to make sure things are right."