CFT Previews: Six-pack of Heisman darkhorses

The early frontrunners for the Heisman Trophy in 2019 will be Clemson quarterback Trevor Lawrence and Alabama quarterback Tua Tagovailoa. But history suggests the preseason favorite or favorites for the Heisman Trophy have a rough time getting to the end of the season as the frontrunner. Every season sees new Heisman contenders come and go