Kirk Cousins thought he’d back up a veteran like Peyton or Vick

Heading into the NFL draft, Michigan State quarterback Kirk Cousins thought he’d be chosen by a team that envisioned him as a future starter after a couple years as an apprentice to a thirtysomething veteran. Instead, Cousins was chosen in the fourth round by the Redskins, where he’ll back up No. 2 overall pick Robert…