Each of these NFL trivia questions has four answers. Further descriptions:Question 4: Not to be confused with the Cardinals’ Million Dollar backfield of the late 1940s that produced only one Hall of Famer (Charley Trippi), the San Fran-version of the $1Million Backfield was fully up with future Canton enshrinees – including three of the most electrifying runners of the 1950s, all on the same team and all battling for carries. Led by a hard-luck QB, the Millionaire Club shattered team rushing records, but failed to win a league title. Name this foursome.