Robert Griffin III won't dress for Washington Redskins

The Washington Redskins already announced that Robert Griffin III wouldn't start Sunday against the Cleveland Browns, but he won't be available at all.

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A Redskins source told NFL.com's Albert Breer that RG3 will not dress, as the team is being extra cautious with the injured lateral collateral ligament in the rookie's right knee.

So, it's all on Kirk Cousins. Offensive coordinator Kyle Shanahan surely will lean on Alfred Morris and the running game, but they can't hide Cousins. And they can't play tentative.

The Redskins need wins to make the playoffs and have no room for error. Cousins will have to make plays to win on the road. Veteran Rex Grossman will be the backup.

Follow Kareem Copeland on Twitter @kareemcopeland.