Nfl

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Miami Dolphins chairman of the board and managing general partner Stephen Ross smiles as he speaks during a news conference at NFL football training camp, Thursday, July 27, 2017 at the team's training facility in Davie, Fla. (AP Photo/Wilfredo Lee)

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Fans call out for autographs from members of the New England Patriots as the players prepare to leave the field at NFL football training camp, Thursday, July 27, 2017, in Foxborough, Mass. (AP Photo/Steven Senne)

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New England Patriots cornerback Stephon Gilmore speaks with reporters at NFL football training camp, Thursday, July 27, 2017, in Foxborough, Mass. (AP Photo/Steven Senne)

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New England Patriots cornerback Malcolm Butler speaks with members of the media at NFL football training camp, Thursday, July 27, 2017, in Foxborough, Mass. (AP Photo/Steven Senne)

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Atlanta Falcons fans watch during NFL football training camp Thursday, July 27, 2017, in Flowery Branch, Ga. (AP Photo/John Bazemore)

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Atlanta Falcons wide receiver Mohamed Sanu (12) plays with his son, Mohamed Jr., after the first day of an NFL training camp football practice Thursday, July 27, 2017, in Flowery Branch, Ga. (AP Photo/John Bazemore)

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Atlanta Falcons outside linebacker Vic Beasley (44) laughs as he talks with teammate Jack Crawford (95) during NFL football training camp Thursday, July 27, 2017, in Flowery Branch, Ga. (AP Photo/John Bazemore)

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Atlanta Falcons head coach Dan Quinn works with his defensive line during NFL football training camp Thursday, July 27, 2017, in Flowery Branch, Ga. (AP Photo/John Bazemore)

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Miami Dolphins running back Jay Ajayi runs through drills past running backs coach Danny Barrett during an NFL football training camp, Thursday, July 27, 2017, at the Dolphins training facility in Davie, Fla. (AP Photo/Wilfredo Lee)

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Miami Dolphins head coach Adam Gase talks to players during an NFL football training camp, Thursday, July 27, 2017 at the Dolphins training facility in Davie, Fla. (AP Photo/Wilfredo Lee)

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Miami Dolphins quarterback Ryan Tannehill, right, crouches down as his son Steel Ryan and wife Lauren run to him after NFL football training camp, Thursday, July 27, 2017, at the team's training facility in Davie, Fla. (AP Photo/Wilfredo Lee)

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Miami Dolphins center Mike Pouncey puts on his helmet after stretching during an NFL football training camp, Thursday, July 27, 2017, at the Dolphins training facility in Davie, Fla. (AP Photo/Wilfredo Lee)

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FILE - In this Dec. 11, 2016, file photo, Minnesota Vikings defensive end Everson Griffen celebrates after sacking Jacksonville Jaguars quarterback Blake Bortles during the first half of an NFL football game in Jacksonville, Fla. The Vikings have signed the two-time Pro Bowler to a contract extension, the team announced Wednesday, July 26, 2017.(AP Photo/Phelan M. Ebenhack, File)