With the Dallas Cowboys set to open training-camp practices Saturday, here is the first of a position-by-position look at their roster:
QUARTERBACKS
Gone from last season: Matt Cassel
New this season: Dak Prescott (fourth-round draft pick)
Position coach: Wade Wilson (10th season as Cowboys quarterbacks coach)
Biggest issue: Kellen Moore has played in three games and started two in his career, and all of them came last season.