Robert Griffin Iii

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Washington Redskins quarterback Robert Griffin III, left, talks with team surgeon Dr. James Andrews before a preseason NFL football game against the Tampa Bay Buccaneers in Tampa, Fla., Thursday, Aug. 29, 2013.(AP Photo/Phelan M. Ebenhack)

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Washington Redskins team physician Dr. Tony Casolaro, right, surgeon Dr. James Andrews, second from right, and team television analyst Joe Theismann watch as quarterback Robert Griffin III, foreground, warms up before a preseason NFL football game against the Tampa Bay Buccaneers in Tampa, Fla., Thursday, Aug. 29, 2013.(AP Photo/Phelan M. Ebenhack)

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Washington Redskins team physician Dr. Tony Casolaro, left, and surgeon Dr. James Andrews look through paperwork while watching quarterback Robert Griffin III warms up before a preseason NFL football game against the Tampa Bay Buccaneers in Tampa, Fla., Thursday, Aug. 29, 2013.(AP Photo/Phelan M. Ebenhack)

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Washington Redskins quarterback Robert Griffin III warms up before an NFL preseason football game against the Buffalo Bills Saturday, Aug. 24, 2013, in Landover, Md. (AP Photo/Nick Wass)

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Washington Redskins offensive coordinator Kyle Shanahan, left, and Washington Redskins quarterback Robert Griffin III (10), right, on the sideline as the Washington Redskins play the Pittsburgh Steelers in NFL preseason football at FedEx Field, Landover, Md., Monday, August 19, 2013. (Andrew Harnik/The Washington Times)

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Washington Redskins quarterback Robert Griffin III (10), right, watches warmups before the Washington Redskins play the Pittsburgh Steelers in NFL preseason football at FedEx Field, Landover, Md., Monday, August 19, 2013. (Andrew Harnik/The Washington Times)

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Left to right: Washington Redskins wide receiver Santana Moss (89), wide receiver Dezmon Briscoe (19), wide receiver Donte' Stallworth (14), and quarterback Robert Griffin III (10) stand together before the Washington Redskins play the Pittsburgh Steelers in NFL preseason football at FedEx Field, Landover, Md., Monday, August 19, 2013. (Andrew Harnik/The Washington Times)

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Washington Redskins quarterback Robert Griffin III (10) leaves the field after the Washington Redskins play the Pittsburgh Steelers in NFL preseason football at FedEx Field, Landover, Md., Monday, August 19, 2013. (Andrew Harnik/The Washington Times)

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Dr. James Andrews, second from left, jokes with Washington Redskins quarterback Robert Griffin III (10) before the Washington Redskins play the Pittsburgh Steelers in NFL preseason football at FedEx Field, Landover, Md., Monday, August 19, 2013. (Andrew Harnik/The Washington Times)

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Dr. James Andrews, Washington Redskins quarterback Robert Griffin III's surgeon, stands on the field before an NFL football game against the Pittsburgh Steelers Monday, Aug. 19, 2013, in Landover, Md. The Redskins won 24-13. (AP Photo/Nick Wass)

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Washington Redskins quarterback Robert Griffin III (10) congratulates Washington Redskins linebacker Ryan Kerrigan (91) after he tips and intercepts a pass for a touchdown in the first quarter as the Washington Redskins play the Pittsburgh Steelers in NFL preseason football at FedEx Field, Landover, Md., Monday, August 19, 2013. (Andrew Harnik/The Washington Times)

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Washington Redskins quarterback Robert Griffin III (10) congratulates Washington Redskins linebacker Ryan Kerrigan (91) after he tips and intercepts a pass for a touchdown in the first quarter as the Washington Redskins play the Pittsburgh Steelers in NFL preseason football at FedEx Field, Landover, Md., Monday, August 19, 2013. (Andrew Harnik/The Washington Times)

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Washington Redskins quarterback Robert Griffin III (10) runs out onto the field before the Washington Redskins play the Pittsburgh Steelers in NFL preseason football at FedEx Field, Landover, Md., Monday, August 19, 2013. (Andrew Harnik/The Washington Times)

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Washington Redskins quarterback Robert Griffin III (10) points to a fan before the Washington Redskins play the Pittsburgh Steelers in NFL preseason football at FedEx Field, Landover, Md., Monday, August 19, 2013. (Andrew Harnik/The Washington Times)

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Washington Redskins wide receiver Pierre Garcon (88), left, and Washington Redskins quarterback Robert Griffin III (10) come out of the tunnel together before the Washington Redskins play the Pittsburgh Steelers in NFL preseason football at FedEx Field, Landover, Md., Monday, August 19, 2013. (Andrew Harnik/The Washington Times)