Redskins quarterback Rex Grossman (8) knows he is the backup to rookie Robert Griffin III (10) but prepares as if the call will come for him to return to the lineup. He also serves as a mentor to rookie Kirk Cousins and second-year pro Jonathan Crompton. (Andrew Harnik/The Washington Times)

Redskins quarterback Rex Grossman (8) knows he is the backup to rookie Robert Griffin III (10) but prepares as if the call will come for him to return to the lineup. He also serves as a mentor to rookie Kirk Cousins and second-year pro Jonathan Crompton. (Andrew Harnik/The Washington Times)