What happened: Coach Klint Kubiak said Tuesday that Cousins will receive extensive work with the first unit. Mendoza begins his first NFL camp in a developmental role.

Why it matters: Las Vegas can evaluate Mendoza without immediately handing him the offense. His fully guaranteed rookie contract gives the franchise a long-term investment at quarterback.

What to watch: First-team reps and preseason snaps will show whether Mendoza can narrow the gap before Week 1.