Dr. Matt Provencher here. Dak Prescott is coming off his ankle fracture/dislocation last year and sources say he was looking great in practice. He had a little hiccup though it seems as he strained his Latissimus Muscle on his right throwing side. There is no way to tell whether this was a freak accident or connected to the fact that he has been rehabbing his foot and though we assume he has been throwing as he progressed it still could be related to tighter muscles in that side from not throwing for a while when his injury occurred. Either way the Cowboys have done the right thing and are letting Dak rest as he recovers from this. The bigger issue at hand is whether these types of smaller injuries will continue to happen as he returns, and they will keep him out a few games. Dak will most likely have some days that he will need to manage pain and swelling in the Ankle and foot and may have some aches and pains elsewhere in the body that may be related but he will be back on the field and will be a good fantasy pick-up this year.