Nfl

943c66d62a5f5913540f6a70670033fc.jpg

Tennessee Titans quarterback Zach Mettenberger, from LSU, warms up during the team's NFL football rookie minicamp on Friday, May 16, 2014, in Nashville, Tenn. (AP Photo/Mark Humphrey)

a7c75eb42a6b5913540f6a7067005717.jpg

Tennessee Titans quarterback Zach Mettenberger, from LSU, watches teammates run a drill during NFL football rookie minicamp practice on Friday, May 16, 2014, in Nashville, Tenn. (AP Photo/Mark Humphrey)

670ef06f4e006f13540f6a706700d2c9.jpg

Cleveland Browns quarterback Johnny Manziel (2) warms up behind Zane Frakes (82) and Blake Jackson (41) during a rookie minicamp practice at the NFL football team's facility in Berea, Ohio Saturday, May 17, 2014. (AP Photo/Mark Duncan)

79c528b34e026f13540f6a706700fa57.jpg

Cleveland Browns owner Jimmy Haslam, left, and head coach Mike Pettine watch rookie minicamp practice at the NFL football team's facility in Berea, Ohio Saturday, May 17, 2014. (AP Photo/Mark Duncan)

dd3ab5504dff6f13540f6a706700d148.jpg

Cleveland Browns quarterback Johnny Manziel passes during a rookie minicamp practice at the NFL football team's facility in Berea, Ohio Saturday, May 17, 2014. (AP Photo/Mark Duncan)

5059f3094e036f13540f6a7067002143.jpg

Cleveland Browns quarterback Johnny Manziel (2) warms up before a rookie minicamp practice at the NFL football team's facility in Berea, Ohio Saturday, May 17, 2014. (AP Photo/Mark Duncan)

52698ab24e006f13540f6a706700e490.jpg

Cleveland Browns quarterback Johnny ManzielMatthew Willis during rookie minicamp practice at the NFL football team's facility in Berea, Ohio Saturday, May 17, 2014. (AP Photo/Mark Duncan)

be84f5ef4e006f13540f6a7067003368.jpg

Cleveland Browns quarterback Johnny Manziel (2) stretches before a rookie minicamp practice at the NFL football team's facility in Berea, Ohio Saturday, May 17, 2014. (AP Photo/Mark Duncan)

bf0cc24a2b725e13540f6a7067006dce.jpg

Oakland Raiders quarterback Derek Carr takes a break from drills during the team's NFL football rookie camp on Friday, May 16, 2014, in Alameda, Calif. (AP Photo/Marcio Jose Sanchez)

cede9ab72b735e13540f6a706700fdd5.jpg

Oakland Raiders linebacker Khalil Mack (52) goes through drills during the team's NFL football rookie camp Friday, May 16, 2014, in Alameda, Calif. (AP Photo/Marcio Jose Sanchez)

0494aa052b745e13540f6a7067008efb.jpg

Oakland Raiders quarterback Derek Carr throws during the team's NFL football rookie camp on Friday, May 16, 2014, in Alameda, Calif. (AP Photo/Marcio Jose Sanchez)