ASHBURN, Va. -- Robert Griffin III remains ahead of schedule in his rehabilitation from major knee surgery.
Shanahan says Griffin is working out at Redskins Park twice a day for a combined six to seven hours.
The coach says he has "no idea" if Griffin will be ready for Week 1 of the regular season, but adds, "If work has anything to do with it, he probably will."
Griffin won the NFL's Offensive Rookie Of The Year award after leading the Redskins to the NFC East title.
Copyright 2013 by The Associated Press