Washington Redskins quarterback Robert Griffin III tosses a pass at the start of training camp at the teams NFL football training facility in Richmond, Va. Thursday, July 25, 2013. The chances of becoming a pro football player are 1.7%.
** FILE ** In this Dec. 10, 2012, file photo, New England Patriots tight end Aaron Hernandez reacts during the second quarter of an NFL football game against the Houston Texans in Foxborough, Mass. (AP Photo/Elise Amendola, File)
New England Patriots tight end Aaron Hernandez reacts during the second quarter of an NFL football game against the Houston Texans in Foxborough, Mass., on Monday, Dec. 10, 2012. (AP Photo/Elise Amendola)
Former New Orleans Saints safety Steve Gleason announces a draft pick during the third round of the NFL Draft, Friday, April 26, 2013 at Radio City Music Hall in New York. (AP Photo/Mary Altaffer)
New England Patriots quarterback Tim Tebow is surrounded by reporters and cameramen after NFL football practice in Foxborough, Mass., Tuesday, June 11, 2013. (AP Photo/Charles Krupa)
Baltimore Ravens head coach John Harbaugh looks on during an NFL football practice at the team's practice facility in Owings Mills, Md., Thursday, June 13, 2013. (AP Photo/Patrick Semansky)
**FILE** New Orleans Saints wide receiver Devery Henderson (19) is pursued by San Diego Chargers cornerback Quentin Jammer (23) in the first half of an NFL football game at the Mercedes-Benz Superdome in New Orleans, Sunday, Oct. 7, 2012. (AP Photo/Dave Martin)
**FILE** Buffalo Bills kicker John Potter kicks off during an NFL football game against the Cleveland Browns Sunday, Sept. 23, 2012, in Cleveland. (AP Photo/David Richard)