Washington Redskins' facility is seen under construction during a NFL football minicamp at Redskins Park, Wednesday, June 12, 2013, in Ashburn, Va. (AP Photo/Carolyn Kaster)
Washington Redskins' facility is seen under construction during a NFL football minicamp at Redskins Park, Wednesday, June 12, 2013, in Ashburn, Va. (AP Photo/Carolyn Kaster)
**FILE** Tennessee Titans center Kevin Matthews talks with a teammate during a workout at the team's NFL football training facility on Friday, June 1, 2012, in Nashville, Tenn. (AP Photo/Mark Humphrey)
NFL Commissioner Roger Goodell speaks during a news conference at the NFL football spring meetings in Boston, Tuesday, May 21, 2013. (AP Photo/Elise Amendola)
Washington Redskins' offensive coordinator Kyle Shanahan, right, talks with quarterbacks Rex Grossman (8) and Pat White (5) during NFL football minicamp at Redskins Park, Wednesday, June 12, 2013, in Ashburn, Va. (AP Photo/Carolyn Kaster)
Washington Redskins' head coach Mike Shanahan, right, and defensive coordinator Jim Haslett talk during NFL football minicamp at Redskins Park, Wednesday, June 12, 2013, in Ashburn, Va. (AP Photo/Carolyn Kaster)
Washington Redskins tight end Jordan Reed leaps to catch a pass during NFL football minicamp at Redskins Park, Wednesday, June 12, 2013, in Ashburn, Va. (AP Photo/Carolyn Kaster)
Washington Redskins tight end Jordan Reed catches a pass during NFL football minicamp at Redskins Park, Wednesday, June 12, 2013, in Ashburn, Va. (AP Photo/Carolyn Kaster)
Quarterback Kirk Cousins (12) prepares to throw during NFL football minicamp at Redskins Park, Wednesday, June 12, 2013, in Ashburn, Va. (AP Photo/Carolyn Kaster)
New England Patriots quarterback Tim Tebow looks upward as he prepares to throw during a NFL football practice in Foxborough, Mass., Tuesday June 11, 2013. (AP Photo/Charles Krupa)
Washington Redskins' quarterback Robert Griffin III, right, walks past a teammate during an NFL football minicamp at Redskins Park, Tuesday, June 11, 2013, in Ashburn, Va. (AP Photo/Carolyn Kaster)
Washington Redskins linebacker London Fletcher (59) walks across the field during NFL football practice at Redskins Park, Thursday, June 6, 2013, in Ashburn, Va. (AP Photo/Luis M. Alvarez)
Washington Redskins full back Eric Kettani talks to a reporter after NFL football practice at Redskins Park, Thursday, June 6, 2013, in Ashburn, Va. (AP Photo/Luis M. Alvarez)
**FILE** New York Jets quarterback Tim Tebow (15) leaves the field after their 29-26 loss in overtime to the New England Patriots in an NFL football game in Foxborough, Mass. Sunday, Oct. 21, 2012. (AP Photo/Elise Amendola)