Denver Broncos rookie Bradley Roby is shown in the gift shop, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

Former Arizona Cardinals player and 2014 Hall of Fame inductee Aeneas Williams gives an inspirational speech to NFL rookies, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

Cleveland Browns rookie Justin Gilbert signs autographs after leaving the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

Cincinnati Bengals rookie Darqueze Dennard, right, talks with San Diego Chargers rookie Jason Verrett, left, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

Oakland Raiders rookie Khalil Mack, looks over old uniforms, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

New England Patriots rookie Dominique Easley is all smiles, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

Miami Dolphins rookies Matt Hazel, Walt Aikens, center and Ja'Wuan James, react while watching a video, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

New York Jets rookies Calvin Pryor, with football, and Jalen Saunders play with an early football, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

Pittsburg Steelers rookies Shaquille Richardson, left, and Dri Archer arrive for the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

Houston Texans rookie Xavier Su'a-Filo,left, and Cameron Fleming, right, a rookie for the New England Patriots play a video game at the beginning of the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

New York Jets rookies Dexter McDougle, left, and Ik Enemkpali try on replica early football helmets at the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

Jacksonville Jaguars rookies Luke Bowanko, left, and Blake Bortles, right, look through displays during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

Houston Texans rookie Jadevon Clowney, squeezes out of a leg display, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

Cleveland Browns rookie Johnny Manziel greets fans as he leaves the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

Houston Texans rookie Jadevon Clowney, right, shakes hands with Pro Football Hall of Fame president David Baker, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

Houston Texans rookie Jadeveon Clowney, compares his arm with New England Patriots rookie Zack Moore, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

Cleveland Browns rookie Johnny Manziel looks at the size of a replica of a 1906 football, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

Cleveland Browns team official Jamil Northcutt, left stands with Browns rookies Johnny Manziel and Terrance West by the Vince Lombardi Super Bowl trophy display during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

Cleveland Browns rookies Pierre Desir, left and Johnny Manziel listen to Pro Football Hall of Fame volunteer Herb Garnes explain the history of football helmets, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

Houston Texans rookie Jadeveon Clowney, flips a replica 1906 football, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Saturday, June 28, 2014. (AP Photo/Phil Long)

Houston Texans' Jadeveon Clowney shows a participant how to play defense during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Cleveland Browns' Johnny Manziel gets a hug from a young girl during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Cleveland Browns' Johnny Manziel throws a pass during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Oakland Raiders' Khalil Mack looks on with participants during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Tennesseen Titans' Avery Williamson, left, and Taylor Lewan block a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Cleveland Browns' Johnny Manziel throws a pass to a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Jacksonville Jaguars' Blake Bortles throws a pass as a participant looks on during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Indianapolis Colts Andrew Jackson helps a participant tackle during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Denver Broncos' Cody Latimer sets up a play with a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Jacksonville Jaguars' Blake Bortles works with participants during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Cincinnati Bengals A.J. McCarron throws a pass to a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Miami Dolphins' Jarvis Landry throws a pass as a participant looks on during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Kansas City Chiefs Cyril Richardson high-fives a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Jacksonville Jaguars' Telvin Smith works with a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

St. Louis Rams rookie Greg Robinson flips a replica 1906 football, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

Washington Redskin rookies Trent Murphy, left, Spencer Long, back to camera and Ryan Grant pause by the statue of Jim Thorpe, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

Former Arizona Cardinals player and 2014 Pro Football Hall of Fame inductee Aeneas Williams delivers an inspirational speech to NFL rookies, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

Former Arizona Cardinals player and 2014 Pro Football Hall of Fame inductee Aeneas Williams delivers an inspirational speech to NFL rookies, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

Green Bay Packers' rookie Ha Ha Clinton-Dix photographs the bust of Deacon Jones during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

Seattle Seahawks rookie Paul Richardson, left, talks with teammate Cassius Marsh, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

Philadelphia Eagles rookie Marcus Smith checks the arm strength display, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

Detroit Lions rookie Larry Webster, left, hugs Lions rookie Eric Ebron, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

Dallas Cowboys rookie Zack Martin checks his hand size at a display during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

Philadelphia Eagles rookie Beau Allen tries out the display shoulder pads as Chicago Bears rookie Charlie Leno watches, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

Washington Redskins rookie Trent Murphy talks while looking at displays, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

New York Giants rookie Odell Beckham, left, and Washington Redskins rookie Lache Seastrunk check a phone message while standing by the Vince Lombardi trophy, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

Atlanta Falcons rookie Jake Matthews takes a photo of the bust of Hall of Fame member Mike Munchak , as Arizona Cardinals rookie Troy Niklas watches, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

Tampa Bay Buccaneers' rookie Mike Evans looks at 1980's era football displays during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

San Francisco 49rs rookie Jimmie Ward plays with a replica of a 1906 football, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

St. Louis Rams rookie Greg Robinson looks at the busts of NFL Hall of Fame members during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

Green Bay Packers' rookie Ha Ha Clinton-Dix photographs the bust of Deacon Jones during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

St. Louis Rams rookie Greg Robinson looks at the busts of NFL Hall of Fame members during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

St. Louis Rams rookie Demetrius Rhaney listens to a speech by Pro Football Hall of Fame president David Baker during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

New York Giants' Devon Kennard, left, and Weston Richburg, both NFC rookies, try to stop a participant during an NFL football Play 60 youth event, part of the NFL's annual Rookie Symposium, at the Cleveland Browns practice facility Tuesday, June 24, 2014, in Berea, Ohio. (AP Photo/Tony Dejak)

New Orleans Saints NFC rookie Tavon Rooks jokes around with a participant during an NFL football Play 60 youth event, part of the NFL's annual Rookie Symposium, at the Cleveland Browns practice facility Tuesday, June 24, 2014, in Berea, Ohio. (AP Photo/Tony Dejak)

Arizona Cardinals' Logan Thomas jokes around with a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Tuesday, June 24, 2014, in Berea, Ohio. The NFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Tony Dejak)

Dallas Cowboys' Ben Gardner tries to tackle a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Tuesday, June 24, 2014, in Berea, Ohio. The NFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Tony Dejak)

Minnesota Vikings' Kendall James blocks a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Tuesday, June 24, 2014, in Berea, Ohio. The NFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Tony Dejak)

Washington Redskins' Morgan Moses, left, and Ted Bolser, right, block a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Tuesday, June 24, 2014, in Berea, Ohio. The NFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Tony Dejak)

Green Bay Packers' Carl Bradford, right, blocks a a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Tuesday, June 24, 2014, in Berea, Ohio. The NFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Tony Dejak)

Chicago Bears' Patrick O'Donnell blocks a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Tuesday, June 24, 2014, in Berea, Ohio. The NFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Tony Dejak)

Atlanta Falcons' Marquis Spruill high-fives a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Tuesday, June 24, 2014, in Berea, Ohio. The NFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Tony Dejak)

Philadelphia Eagles' Beau Allen chases after a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Tuesday, June 24, 2014, in Berea, Ohio. The NFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Tony Dejak)

Seattle Seahawks' Cassius Marsh blocks a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Tuesday, June 24, 2014, in Berea, Ohio. The NFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Tony Dejak)

St. Louis Rams' Michael Sam, left, tries to stop a participant during an NFL football Play 60 youth event, part of the NFL's annual Rookie Symposium, at the Cleveland Browns practice facility Tuesday, June 24, 2014, in Berea, Ohio. (AP Photo/Tony Dejak)

St. Louis Rams' Greg Robinson, left, tries to tackle a participant during an NFL football Play 60 youth event, part of the NFL's annual Rookie Symposium, at the Cleveland Browns practice facility Tuesday, June 24, 2014, in Berea, Ohio. (AP Photo/Tony Dejak)

Tampa Bay Buccaneers NFC rookie Mike Evans, right, tries to block a participant during an NFL football Play 60 youth event, part of the NFL's annual Rookie Symposium, at the Cleveland Browns practice facility Tuesday, June 24, 2014, in Berea, Ohio. (AP Photo/Tony Dejak)

Minnesota Vikings NFC rookie Teddy Bridgewater tosses the ball to a participant during an NFL football Play 60 youth, part of the NFL's annual Rookie Symposium, at the Cleveland Browns practice facility Tuesday, June 24, 2014, in Berea, Ohio. (AP Photo/Tony Dejak)

Houston Texans' Jadeveon Clowney shows a participant how to play defense during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Jacksonville Jaguars' Telvin Smith works with a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Jacksonville Jaguars' Blake Bortles works with participants during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

New York Jets rookies, including Jeremiah George, front center, pose for a photo with participants during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Indianapolis Colts Andrew Jackson helps a participant tackle during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Denver Broncos' Cody Latimer sets up a play with a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Green Bay Packers rookie Ha Ha Clinton-Dix takes a photo of the bust of Hall of Fame member Deacon Jones, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

Oakland Raiders' Khalil Mack looks on with participants during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Seattle Seahawks rookie Cassius Marsh, left, New York Giants rookie Odell Beckham, center, and Washington Redskins rookie Lache Seastrunk, look at the Vince Lombardi Super Bowl trophy, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

Cincinnati Bengals A.J. McCarron throws a pass to a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Cleveland Browns' Johnny Manziel throws a pass to a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

San Francisco 49'ers rookie Jimmie Ward spins a replica of a 1906 football, during the 2014 NFL Rookie Symposium at the Pro Football Hall of Fame in Canton, Ohio, Wednesday, June 25, 2014. (AP Photo/Phil Long)

Tennessee Titans rookies look on as a participant does a back flip during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Miami Dolphins' Jarvis Landry throws a pass as a participant looks on during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)

Kansas City Chiefs Cyril Richardson high-fives a participant during an NFL football Play 60 youth event at the Cleveland Browns practice facility Friday, June 27, 2014, in Berea, Ohio. The AFC rookies took part in the NFL's annual Rookie Symposium. (AP Photo/Aaron Josefczyk)