As of now, the Dallas Cowboys have three quarterbacks on the roster: Dak Prescott, Cooper Rush, and Mike White. Prescott has not missed a game his entire NFL career, but at any point, he could be injured and miss time.
White was drafted last year in the fifth round of the NFL draft. The only NFL experience for White came in last year’s preseason. In those four games, White completed 44 of 70 passes (62.8 completion percentage) for a combined 414 yards (5.9 yards per attempt), zero touchdowns, and one interception.