Summary: Jason and Kevin preview Sunday's Chicago Marathon and discuss an interesting men's field featuring the the world record holders in the marathon and half marathon, the top American, the defending champion and pool of emerging Americans. <br> <br> The guys also discuss Jordan Hasay's path to the podium in the women's race, the expected showdown between Tirunesh Dibaba and Florence Kiplagat and the nominees for IAAF Athlete of Year.
