Robert Griffin III in pain on the turf at FedEx Field after his injury Sunday. (NIck Wass/AP)

Robert Griffin Jr. says his son, the Redskins’ injured star quarterback, plans to play Sunday when Washington takes on the Cleveland Browns in Cleveland.
In text messages, Griffin said his son is doing “really good.” Asked whether he thought Griffin III could play Sunday he responded: “That is the plan.”
Redskins’ Coach Mike Shanahan said Monday afternoon that the quarterback has a “mild,”  Grade 1 sprain of the lateral collateral ligament in his right knee, an injury he suffered when he was hit by Baltimore Ravens’ lineman Haloti Ngata during the waning minutes of Sunday’s game.
Shanahan would not reveal whether Griffin will play Sunday. He said most quarterbacks want to get back on the field but coaches must see how they fare in practice before making that decision.
Redskins left tackle Trent Williams said he also spoke to Griffin Monday and reported that the rookie is in “high spirits.” Williams refused to speculate on whether Griffin would play Sunday at Cleveland, however.

“He’s doing good, he’s in high spirits,” Williams said Monday afternoon. “We’re lucky. It was a pretty, nasty, awkward hit. For him not to be seriously injured, it’s a blessing.”

In Week 5, Griffin suffered a concussion. His status for the sixth game was uncertain early in the week, but Griffin was cleared to play and didn’t miss the following game.

Williams has played through knee injuries in each of the last three seasons, but didn’t want to say whether he expected Griffin to play.

“That’s totally up to him,” Williams said. “His health is far more important than any game we’ll play this season. His well-being is the only thing he should be worried about at this time. It’s really not worth injuring more, if he is at risk. It’s all up to him, with what his situation is. My situation’s a little different.”