Two things that go into this….
1) how do the cowboys feel about Milton? I doubt they take Sorsby if they still feel Milton has upside. No way they roster 4 QBs. Howell could be a roster casualty too, but as of today he’s probably QB2 I’m guessing.
2) how long do the cowboys feel Dak has left? It makes no sense to start a rookie qb clock this early if you may look at an extension to Dak to help the cap hits. If you’re taking a QB now there should be a path for him to play by year 3 of their rookie deal IMO….especially if it’s not a round 1 guy with an option year.