ASHBURN, Va. – All the medical terms associated with Robert Griffin III’s knee injury can be boiled down to one simple message: It’s not too bad.

Beyond that, there still are some very important unknowns.

The NFL’s top-rated quarterback might or might not play Sunday when the Washington Redskins visit the Cleveland Browns. Coach Mike Shanahan, knowing full well that it makes the other team work extra to prepare for two quarterbacks, no doubt will wait as long as possible to publicly commit one way or the other to Griffin or fellow rookie Kirk Cousins.