The line from Joe Theismann’s last season as the Washington Redskins’ quarterback to John Beck’s first start in that role on Sunday is looping and squiggly, a toddler’s scribble on the paper placemat in a diner. It connects Super Bowl winners (Doug Williams, Mark Rypien) to past-their-prime stars (Mark Brunell, Donovan McNabb) to Pro Bowlers (Rypien, Jay Schroeder, Gus Frerotte, Brad Johnson) to first-round picks (Heath Shuler, Patrick Ramsey, Jason Campbell) to vagabond veterans (Rex Grossman, Tony Banks) to geez-do-you-remember-him characters (Rob Johnson, John Friesz, so many others).