Tampa Bay Buccaneers running back Doug Martin (22) jumps over obstacles as he is hit with pads during an NFL football training camp practice Monday, July 31, 2017, in Tampa, Fla. (AP Photo/Chris O'Meara)
Tennessee Titans head coach Mike Mularkey fist bumps tight end Jonnu Smith (81) after Smith caught a pass during NFL football training camp Monday, July 31, 2017, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans running back DeMarco Murray, left, runs the ball during NFL football training camp Monday, July 31, 2017, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Seattle Seahawks strong safety Kam Chancellor runs during an NFL football training camp, Monday, July 31, 2017, in Renton, Wash. (AP Photo/Ted S. Warren)
Kansas City Chiefs linebacker Derrick Johnson, second from right, warms up during NFL football training camp, Wednesday, July 26, 2017, in St. Joseph, Mo. (Jessica A. Stewart/The St. Joseph News-Press via AP)
Kansas City Chiefs linebacker Justin Houston poses for a photo with fan Mica Stiffle, 16, of Goddard, Kan., Friday, July 28, 2017, at the NFL football team's training camp in St. Joseph, Mo. (Jessica A. Stewart/The St. Joseph News-Press via AP)
Minnesota Vikings tackle Mike Remmers (72) protects quarterback Sam Bradford (8) from defensive end Danielle Hunter (99) during NFL football training camp Friday, July 28, 2017, in Mankato, Minn. (AP Photo/Andy Clayton-King)
Denver Broncos offensive guard Billy Turner heads to the locker room after drills at an NFL football training camp Monday, July 31, 2017, in Englewood, Colo. (AP Photo/David Zalubowski)
Denver Broncos quarterback Paxton Lynch jokes with teammates during drills at an NFL football training camp Monday, July 31, 2017, in Englewood, Colo. (AP Photo/David Zalubowski)
Denver Broncos quarterback Trevor Siemian throws a pass during drills at an NFL football training camp Monday, July 31, 2017, in Englewood, Colo. (AP Photo/David Zalubowski)
Denver Broncos offensive tackle Garett Bolles takes a break during drills at an NFL football training camp Monday, July 31, 2017, in Englewood, Colo. (AP Photo/David Zalubowski)
Oakland Raiders defensive end Khalil Mack stretches during an NFL football training camp, Monday, July 31, 2017, in Napa, Calif. (AP Photo/Eric Risberg)
Oakland Raiders defensive end Khalil Mack leads a group of players through a drill during an NFL football training camp Monday, July 31, 2017, in Napa, Calif. (AP Photo/Eric Risberg)
Seattle Seahawks running back Eddie Lacy, right, carries the ball during an NFL football training camp, Monday, July 31, 2017, in Renton, Wash. (AP Photo/Ted S. Warren)
Seattle Seahawks strong safety Kam Chancellor catches the ball during an NFL football training camp, Monday, July 31, 2017, in Renton, Wash. (AP Photo/Ted S. Warren)
Seattle Seahawks strong safety Kam Chancellor holds hands with his wife Tiffany after NFL football training camp, Monday, July 31, 2017, in Renton, Wash. (AP Photo/Ted S. Warren)
Tennessee Titans quarterback Marcus Mariota passes during NFL football training camp Monday, July 31, 2017, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans offensive tackle Jack Conklin kisses his 4-month-old daughter, Riley Conklin, after NFL football training camp Monday, July 31, 2017, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans wide receiver Corey Davis (84) signs autographs following NFL football training camp Monday, July 31, 2017, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans outside linebacker Kevin Dodd walks through a defensive play during NFL football training camp Sunday, July 30, 2017, in Nashville, Tenn. (AP Photo/Mark Zaleski)