The Mavericks and 16-year team physician Dr. T.O. Souryal are parting ways, likely at the end of the season, according to Eddie Sefko of the Dallas Morning News.
Sefko's story cites "philosophical differences" on "non-medical issues" as the reason for the departure and there's no evidence to think that's not true. Several Mavericks have rehabbed or are continuing to rehab successfully from offseason injuries, including Wesley Matthews, Chandler Parsons and JaVale McGee. All three returned on schedule or sooner than anticipated, at least according to their public injury timelines.
Souryal reportedly wanted to wait until those three had fully returned from their injuries before announcing his departure from the team. There's no news on who the new lead physician or team of physicians would be for the Mavericks, or whether they'd be named immediately.
The only curious aspect of this story is whether the Mavericks' elongated minute restrictions have factored into this, specifically with Parsons, who will have spent nearly two months working off a gradually increasing restriction by the time he is fully cleared by team doctors. Restrictions doled out as such aren't incredibly common in the NBA and certainly hasn't been seen in Dallas, either.
Regardless, I wouldn't expect to see any sort of drop off in the Mavericks' excellent training staff, which is widely respected around the league and clearly showed their worth this season.