Washington Redskins quarterback Robert Griffin III indicated that he's been cleared to practice by doctors as he has made a speedy recovery from a serious knee injury that involved damage to his anterior cruciate ligament.

Although he's not expected to be on the physically unable to perform list to start camp, Griffin did note that he wouldn't be completely unrestricted to start training camp.

"Doctors cleared me to practice," Griffin wrote on his Twitter account. "Coach is going to ease me in. Thank you for your support & See you in Richmond

Dr. James Andrews, his surgeon, conducted the examination.

It's a fast comeback from one of the most exciting, talented young players in the NFL, and it's a testament to Griffin's will to return and how much he loves the game of football.

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Aaron Wilson covers the Ravens for The Baltimore Sun.