Washington Redskins quaterback Robert Griffin III lies on the ground after fumbling the ball against the Seattle Seahawks during the fourth quarter of an NFL football wild card playoff game Sunday, Jan. 6, 2013, in Landover, Md. Griffin left the game. (AP Photo/The Seattle Times, John Lok) SEATTLE OUT MAGS OUT NO SALES MANDATORY CREDIT TV OUT USA TODAY OUT (The Associated Press)
Washington Redskins quarterback Robert Griffin III sits on the bench after a knee injury during an NFL wild card playoff football game against the Seattle Seahawks in Landover, Md., Sunday, Jan. 6, 2013. The Seahawks defeated the Redskins 24-14. (AP Photo/Evan Vucci) (The Associated Press)
Washington Redskins quarterback Robert Griffin III twists his knees as he reaches for the loose ball after a low snap during the second half of an NFL wild card playoff football game against the Seattle Seahawks in Landover, Md., Sunday, Jan. 6, 2013. (AP Photo/Matt Slocum) (The Associated Press)
ASHBURN, Va. – Robert Griffin III knows he's getting criticized for playing hurt in the Washington Redskins' playoff loss.
On Monday, he offered his latest defense on Twitter.
The rookie quarterback tweeted: "Many may question, criticize & think they have all the right answers. But few have been in the line of fire in battle."
The Redskins were awaiting the results of an MRI on Griffin's right knee, which he re-injured twice during Sunday's 24-14 loss to the Seattle Seahawks.
Griffin did not appear in the locker room during the two hours it was open to reporters Monday morning. Teammates defended Griffin, saying it's in an athlete's competitive nature to keep playing as long as possible.
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