Colt McCoy to serve as Kirk Cousins' backup, rather than Robert Griffin III

Tom Pelissero | USA TODAY Sports

Colt McCoy will be Washington Redskins quarterback Kirk Cousins' backup for Sunday's opener over Robert Griffin III, a person with knowledge of the decision said Saturday.

The person spoke to USA TODAY Sports on the condition of anonymity because the Redskins hadn't announced the decision.

Griffin wasn't expected to play in Week 1 since an independent neurologist reversed course on initial clearance from a concussion RG3 suffered Aug. 20. He was medically cleared Friday and listed as probable for Sunday's season opener against the Miami Dolphins, but his reps had been limited because of the injury.

The depth chart figures to clarify over the next couple weeks. Coach Jay Gruden has said Cousins will be the starter for the 2015 season.