It's Rivalry Week in the world of college football! Mina Kimes discusses the unique nature of the bowl system - more than 30 games and we haven't even reached the peak ones. Then: a replay of our story where we enter the world of NHL dentists - the brave heroes who attempt to put hockey players' notorious grins back together. ESPN writer Dave Fleming takes Mina on a gory, grueling journey of mouth molds, chiclets, emergency surgery and more tales of dental hockey horror.