The Green Bay Packers could not hold on to a huge early lead, but in the game’s final seconds Aaron Rodgers was given one more chance to score, and his long completion to Jared Cook set up Mason Crosby’s game-winning 51-yard field goal in a 34-31 victory over the Dallas Cowboys that earned the Packers a trip to the N.F.C. championship game next week against Atlanta.
After a string of boring playoff blowouts this season, all won by home teams, Green Bay bucked the trend in a thrilling game in which the team raced to a 21-3 lead only to slowly let Dallas back into the game.