One of the most influential voices of John Morton’s career is in the building. Former Oakland/Las Vegas Raiders and Tampa Bay Buccaneers head coach Jon Gruden spent Monday watching the Detroit Lions practice, and it seems he’ll stick around for Tuesday’s session, as well. Gruden gave Morton his first coaching gig in 1998, and Detroit’s new offensive coordinator has consistently spoken glowingly about him, crediting Gruden with being a mentor who’s helped shape the way he views the sport.