New York Giants players participate in a drill during NFL football rookie minicamp in East Rutherford, N.J., Friday, May 11, 2012. (AP Photo/Mel Evans)

St. Louis Rams running back Steven Jackson catches a pass with one hand during NFL football practice Wednesday, May 16, 2012, at the team's training facility in St. Louis. (AP Photo/Jeff Roberson)

St. Louis Rams linebacker Alex Hoffman-Ellis heads to a drill at the start of NFL football practice, Wednesday, May 16, 2012, at the team's training facility in St. Louis. (AP Photo/Jeff Roberson)

St. Louis Rams defensive tackle Michael Brockers takes part in a drill during NFL football practice, Wednesday, May 16, 2012, at the team's training facility in St. Louis. (AP Photo/Jeff Roberson)

St. Louis Rams quarterback Sam Bradford throws during NFL football practice, Wednesday, May 16, 2012, at the team's training facility in St. Louis. (AP Photo/Jeff Roberson)

Seattle Seahawks quarterback Russell Wilson passes during NFL football rookie minicamp on Friday, May 11, 2012, in Renton, Wash. (AP Photo/Ted S. Warren)

Buffalo Bills' Stephon Gilmore looks on after an NFL football rookie camp in Orchard Park, N.Y., Friday, May 11, 2012. (AP Photo/David Duprey)

St. Louis Rams running back Isaiah Pead catches a pass during the NFL football team's rookie minicamp Saturday, May 12, 2012, in St. Louis. (AP Photo/Jeff Roberson)

St. Louis Rams tight end Deangelo Peterson, right, catches a pass despite pressure from defensive back Matthew Daniels during the NFL football team's rookie minicamp, Saturday, May 12, 2012, in St. Louis. (AP Photo/Jeff Roberson)

Wide receiver Rueben Randle (82), second-round draft pick, catches a pass during football drills at the New York Giants rookie minicamp in East Rutherford, N.J., Saturday, May 12, 2012. (AP Photo/Mel Evans)

A slow shutter speed blurs a line of sprinting football players as they run a football drill at the New York Giants rookie minicamp in East Rutherford, N.J., Saturday, May 12, 2012. (AP Photo/Mel Evans)

May 11, 2012; San Diego, CA, USA; San Diego Chargers defensive lineman Kendall Reyes (91) hits a blocking dummy at rookie minicamp at Chargers Park. Mandatory Credit: Kirby Lee/Image of Sport-US PRESSWIRE

Chicago Bears drafted players, undrafted free agents and workout players stretch during the NFL team's football rookie minicamp in Lake Forest, Ill., Saturday, May 12, 2012. (AP Photo/ Nam Y. Huh)

New York Giants wide receiver Brandon Collins (8) reaches to catch a pass during a drill at the team's NFL football rookie minicamp in East Rutherford, N.J., Saturday, May 12, 2012. (AP Photo/Mel Evans)

New York Giants tackles Matt McCants, left, and Joel Reinders do a blocking drill during at Giants rookie NFL football minicamp in East Rutherford, N.J., Saturday, May 12, 2012. (AP Photo/Mel Evans)

Chicago Bears tryout linebacker Tyler Holmes tries to catch a ball during the NFL team's football rookie minicamp in Lake Forest, Ill., Saturday, May 12, 2012. (AP Photo/ Nam Y. Huh)

New York Jets quarterback Tim Tebow sits at his locker at the teams football training facility, Thursday, May 10, 2012 in Florham Park, N.J. (AP Photo/Julio Cortez)

New York Jets quarterback Mark Sanchez talks to the media at his locker in the teams football training facility, Thursday, May 10, 2012 in Florham Park, N.J. (AP Photo/Julio Cortez)

New York Jets quarterback Tim Tebow sits at his locker at the teams training center, Thursday, May 10, 2012 in Florham Park, N.J. (AP Photo/Julio Cortez)

New San Francisco 49ers wide receiver Randy Moss catches a ball during NFL football practice at the team's training facility in Santa Clara, Calif., Thursday, May 10, 2012. (AP Photo/Paul Sakuma)

San Francisco 49ers tight end Vernon Davis smiles during NFL football practice at the team's training facility in Santa Clara, Calif., Thursday, May 10, 2012. (AP Photo/Paul Sakuma)

San Francisco 49ers quarterback Alex Smith passes during NFL football practice at the team's training facility in Santa Clara, Calif., Thursday, May 10, 2012. (AP Photo/Paul Sakuma)

Indianapolis Colts quarterback Andrew Luck throws during the NFL team's football rookie minicamp in Indianapolis, Friday, May 4, 2012. (AP Photo/Michael Conroy)

Indianapolis Colts quarterback Andrew Luck, right, jokes with tight end Coby Fleener as the two leave the field following a practice during the NFL team's football rookie mini-camp in Indianapolis, Friday, May 4, 2012. Luck and Fleener were teammates at Stanford. (AP Photo/Michael Conroy)

Pittsburgh Steelers fourth round draft pick nose tackle Ta'amu Alameda (95) out of Washington, participates in a drill with Steelers defensive Assistant coach Jerry Olsavsky, right, during the NFL football team's rookie minicamp at their facility in Pittsburgh on Friday, May 4, 2012. (AP Photo/Keith Srakocic)

Pittsburgh Steelers free agent wide receiver Connor Dixon, out of Duquesne, catches a pass in a drill during the NFL football team's rookie minicamp at their facility in Pittsburgh on Friday, May 4, 2012. (AP Photo/Keith Srakocic)

Minnesota Vikings wide receiver Jarius Wright makes a catch during rookie football mini-camp, Friday, May 4, 2012, in Eden Prairie, Minn. Wright was an NFL fourth-round draft pick. (AP Photo/Genevieve Ross)

Dallas Cowboys rookies tight end James Hanna (84) and cornerback Morris Claiborne (24) walk off the field after a morning workout at rookie minicamp at the team's football training facility, Friday, May 4, 2012, in Irving, Texas. (AP Photo/Tony Gutierrez)

Jacksonville Jaguars center Mike Brewster, top, runs through a drill with Andrew Lanier (73) during NFL football rookie minicamp, Friday, May 4, 2012, in Jacksonville, Fla. (AP Photo/John Raoux)

Miami Dolphins' Cort Dennison (59) chases Marcus Thigpen (34) during NFL football rookie camp, Friday, May 4, 2012, in Davie, Fla. (AP Photo/J Pat Carter)

May 4, 2012; Tampa, FL, USA; Tampa Bay Buccaneers safety Mark Barron (24) works out during rookie mini camp at One Buc. Mandatory Credit: Kim Klement-US PRESSWIRE

May 4, 2012; Florham Park, NJ, USA; New York Jets wide receiver Stephen Hill (84) catches pass during minicamp at the Jets Training Center. Mandatory Credit: Jim O'Connor-US PRESSWIRE

Washington Redskins quarterback Robert Griffin III throws during the first day of NFL football training camp at Redskins Park in Ashburn, Va., Sunday, May 6, 2012. (AP Photo/Manuel Balce Ceneta)

Carolina Panthers' Luke Kuechly smiles as he walks to the field before an NFL football minicamp in Charlotte, N.C., Friday, May 11, 2012. (AP Photo/Chuck Burton)

Carolina Panthers' Tauren Poole (33) catches a ball during an NFL football minicamp in Charlotte, N.C., Friday, May 11, 2012. (AP Photo/Chuck Burton)

Arizona Cardinals head coach Ken Whisenhunt gives instructions during a rookies and free agents NFL football mini camp, Friday, May 11, 2012, at the team's facility in Tempe, Ariz. (AP Photo/Matt York)

Arizona Cardinals sixth-round draft pick Ryan Lindley (14) throws in a drill during a rookies and free agents NFL football mini camp, Friday, May 11, 2012, at the team's facility in Tempe, Ariz. (AP Photo/Matt York)

Arizona Cardinals first-round draft pick Michael Floyd runs drills during a rookies and free agents NFL football mini camp, Friday, May 11, 2012, at the team's facility in Tempe, Ariz. (AP Photo/Matt York)

New England Patriots defensive rookie players Dont'a Hightower (45) and Chandler Jones, both selected in the first round of the draft, catch their breath during NFL football rookie minicamp at the team's facility in Foxborough, Mass., Friday, May 11, 2012. (AP Photo/Stephan Savoia)

Tackles Brandon Mosley, right, a fourth-round draft pick, and Renardo Foster, left, work during blocking drills at the New York Giants' NFL football rookie minicamp in East Rutherford, N.J., Friday, May 11, 2012. (AP Photo/Mel Evans)

Rookie wide receiver Gerell Robinson reaches for a pass during the Denver Broncos NFL football rookie minicamp at the team's training facility in Englewood, Colo., on Friday, May 11, 2012. (AP Photo/Ed Andrieski)

Safety Will Hill (18) makes a catch during drills at the New York Giants' NFL football rookie minicamp in East Rutherford, N.J., Friday, May 11, 2012. (AP Photo/Mel Evans)

Rookie tight ends Adrien Robinson, left, and Kevin Doty work a drill during the New York Giants' NFL football rookie minicamp in East Rutherford, N.J., Friday, May 11, 2012. (AP Photo/Mel Evans)

Cincinnati Bengals wide receiver Marvin Jones, right, catches a pass in front of defensive back Shaun Prater (38) during NFL football rookie minicamp at Paul Brown Stadium, Friday, May, 11, 2012, in Cincinnati. (AP Photo/Tony Tribble)

Cleveland Browns wide receiver Travis Benjamin catches a pass during practice at the NFL football team's rookie camp in Berea, Ohio Friday, May 11, 2012. (AP Photo/Mark Duncan)

Kansas City Chiefs defensive tackle Dontari Poe (92) runs between drills during NFL football minicamp at the team's practice facility in Kansas City, Mo., Friday, May 11, 2012. (AP Photo/Orlin Wagner)

New York Giants defensive tackle and seventh-round draft pick Markus Kuhn, of Germany, answers a question after the team's NFL football rookie minicamp in East Rutherford, N.J., Friday, May 11, 2012. (AP Photo/Mel Evans)

Chicago Bears defensive linemen Shea McClellin (99) works a slashing drill against a blocking dummy during the NFL team's football rookie minicamp in Lake Forest, Ill., Friday, May 11, 2012. (AP Photo/ Nam Y. Huh)

Detroit Lions quarterback Kellen Moore throws during rookie minicamp NFL football practice in Allen Park, Mich., Friday, May 11, 2012. (AP Photo/Paul Sancya)

Chicago Bears defensive linemen Shea McClellin (99) stretches during the NFL football rookie minicamp in Lake Forest, Ill., Friday, May 11, 2012. (AP Photo/ Nam Y. Huh)

St. Louis Rams cornerback Janoris Jenkins catches a ball during NFL football rookie minicamp, Friday, May 11, 2012, at the team's training facility in St. Louis. (AP Photo/Jeff Roberson)

Carolina Panthers' Luke Kuechly (59) run after catching a ball during the NFL team's minicamp football practice for rookies and free agents in Charlotte, N.C., Saturday, May 12, 2012. (AP Photo/Chuck Burton)

Baltimore Ravens linebacker Courtney Upshaw speaks at a news conference after NFL foootball rookie camp practice in Owings Mills, Md., Sunday, May 13, 2012. (AP Photo/Patrick Semansky)

Oakland Raiders running back Darren McFadden carries the ball during an NFL football minicamp, Tuesday, May 15, 2012, in Alameda, Calif. (AP Photo/Ben Margot)

The Oakland Raiders 5th round draft pick, offensive lineman Juron Criner, during the three-day rookie mini-camp at the Raiders Alameda practice facility. (Tony Gonzales/Oakland Raiders)