Pac-12 Networks' Mike Yam, Curtis Conway and Matt Leinart discuss their three favorites for college football's top award during "Nissan Heisman Watch." Alabama's Derrick Henry has jumped to the top of the favorites list, while Stanford's Christian McCaffrey remains in the conversation. See more Heisman analysis every Tuesday night during "Inside Pac-12 Football" at 8 p.m. PT/9 p.m. MT on Pac-12 Network.