A look at non-NFL players in the Pro Football Hall of Fame – NBC Sports Chicago
The Pro Football Hall of Fame's NFL domination: Why it's so rare to find another path to Canton - The Athletic
219 George Allen Redskins Photos & High Res Pictures - Getty Images
Canton's Most Glaring (And Forgotten) Omissions - Rick Gosselin
Coach George Allen enters 49er Hall of Fame – Orange County Register
George Allen: A Football Life: Richman, Michael, Vermeil, Dick: 9780803249684: : Books
Joe Thomas, Ronde Barber Make Hall of Fame Finalist Cut
Coach George Allen enters 49er Hall of Fame – Orange County Register
Six former Buffalo Bills among 129 Pro Football Hall of Fame nominees - Buffalo Rumblings