The man appeared behind Christian McCaffrey after the Rose Bowl game like an apparition: Stanford shirt, Stanford hat, beaded necklace, big wad of chewing gum, big goofy grin. He had a simple message, delivered, over and over again, through cupped hands:
McCaffrey, the Stanford running back who finished second in last season’s Heisman Trophy voting, is focused and grounded. Those attributes, plus speed and shiftiness that make him one of the hardest players in the country to tackle, propelled him to 2,019 rushing yards and 645 receiving yards last season.
His most impressive feat of concentration, though, might have been that...