And yet, injuries including at the QB position are a fact of life, and those teams who have cultivated some decent depth will be unquestionably better off when the time comes…see Bills with Trubisky, who arguably will be a starter again next year somewhere. Hostetler & Foles even won Super Bowls as backups who had to step in during those years—to say nothing of Reich, who engineered the greatest comeback in NFL history as a career backup…