In what year did the guest wrestling coach for person that many consider to be the greatest mixed martial artists of all time win a silver medal a the Summer Olympics?
Jamill Kelly:  He represented the United States at the 2004 Summer Olympic Games where he earned a silver medal. Jamill Kelly:  In 2015, he became a guest wrestling coach for Daniel Cormier, Luke Rockhold and Cain Velasquez, all from the American Kickboxing Academy. Daniel Cormier:  He is considered by many to be one of the greatest mixed martial artists of all time.
2004