How a rivalry gets stirred up
GREEN BAY, Wis. -- So this is how a rivalry builds.Play three times in a 12-month stretch, including twice on opening day and once in the playoffs in between. Make comments about hitting the opposing team's quarterback. Then hit the opposing team's quarterback. And then listen to that quarterback's head coach suggest that defensive player is dirty.That's where things stood on Monday between the San Francisco 49ers and the Green Bay Packers.