Seattle Seahawks running back Marshawn Lynch, left, and wide receiver B.J. Daniels, right, who is riding on an electric self-balancing scooter commonly called a "hoverboard," arrive for an NFL football game, Sunday, Oct. 18, 2015, in Seattle. (AP Photo/Stephen Brashear)

LeSean McCoy of the Buffalo Bills arrives at Heathrow Airport on October 19, 2015. (Dave Shopland/NFL)

Buffalo Bills cornerback Ron Brooks rides to Ralph Wilson Stadium before an NFL football game against the Indianapolis Colts on Sunday, Sept. 13, 2015, in Orchard Park, N.Y. (AP Photo/Gary Wiepert)

In this Wednesday, Sept. 23, 2015, photo, Tennessee Titans linebacker Brian Orakpo is interviewed in the locker room while riding on a motorized skateboard in Nashville, Tenn. Many of the Titans players use the devices to travel through the team's facility. (AP Photo/Mark Humphrey)

Indianapolis Colts wide receiver Donte Moncrief rides a motorized personal transport device to a media availability after arriving for the NFL football team's training camp in Anderson, Ind., Saturday, Aug. 1, 2015. (AP Photo/AJ Mast)

Minnesota Vikings wide receiver Cordarrelle Patterson, left, rides his PhunkeeDuck, a self balancing scooter, as teammates from left, Mike Wallace, Stefon Diggs and DaVaris Daniels follow on their bikes, to the morning practice session at an NFL football training camp on the campus of Minnesota State University Monday, July 27, 2015, in Mankato, Minn. (AP Photo/Charles Rex Arbogast)

Pittsburgh Steelers safety Alden Darby demonstrates his CyBoard scooter board after he arrived for NFL football training camp at the team training facility in Latrobe, Pa. on Saturday, July 25, 2015 . (AP Photo/Keith Srakocic)

Cincinnati Bengals middle linebacker Rey Maualuga arrives before an NFL football game against the Kansas City Chiefs, Sunday, Oct. 4, 2015, in Cincinnati. (AP Photo/Frank Victores)

Buffalo Bills cornerback Ronald Darby (28) arrives at Sun Life Stadium prior to an NFL football game against the Buffalo Bills on Sunday, September 27, 2015 in Miami Gardens, Fla. The Bills defeated the Dolphins 41-14. (Perry Knotts via AP)

Seattle Seahawks wide receiver B.J. Daniels rides through a hallway at CenturyLink Field on an electric self-balancing scooter as he arrives for an NFL football game against the Detroit Lions, Monday, Oct. 5, 2015, in Seattle. (AP Photo/Elaine Thompson)

Seattle Seahawks wide receiver B.J. Daniels rides through a hallway at CenturyLink Field on an electric self-balancing scooter commonly called a "hoverboard," as he arrives for an NFL football game against the Detroit Lions, Monday, Oct. 5, 2015, in Seattle. (AP Photo/Elaine Thompson)

Cincinnati Bengals middle linebacker Rey Maualuga arrives before an NFL football game against the Seattle Seahawks, Sunday, Oct. 11, 2015, in Cincinnati. (AP Photo/Gary Landers)

Carolina Panthers' Mario Addison rides an Oxboard scooter to the dorms as he arrives at the NFL football team's training camp in Spartanburg, S.C., Thursday, July 30, 2015. (AP Photo/Chuck Burton)