Two plays later, Rams quarterback James “Shack” Harris was intercepted in the end zone and the Vikings went on to win, 14-10. “I never moved,” said Mack, recounting the play 50 years later.

Trailing 7-3, the Rams had the ball inside the Vikings’ 1-yard line. The call was for James Harris on a quarterback sneak, but the Rams never got the play off because Hall of Fame guard Tom Mack ...