Nike recently introduced its newest football line – ”Nike Vapor Untouchable” — with their latest addition to the Nike team, Marcus Mariota, being the cover persona. Check out the ad below — Speed hits a new gear. Nike is proud to welcome Marcus Mariota to football’s fastest family. #justdoithttps://t.co/Z0ApbJauNh — Nike Football (@usnikefootball) April 20, 2015 Nike recently signed Mariota to an endorsement …