Mostert didn't practice Wednesday due to a knee injury, David Furones of the South Florida Sun Sentinel reports.
Coming off a bye, it's notable that Mostert sat out the Dolphins' first Week 12 practice session, though his absence might have been maintenance-related rather than the result of a setback with his surgically repaired knee. Thursday's practice report should add further context on that front, and if Mostert is able to participate in any capacity, he'll be on track to suit up Sunday against the Texans.