From 1994 to 1996, Calhoon was an Assistant Athletic Trainer at the University of Memphis, where he worked primarily with the volleyball and men's basketball programs. During that time, he earned his master's degree in human movement science from the University of Memphis, and was credentialed as a Certified Strength & Conditioning Specialist (CSCS) by the National Strength and Conditioning Association.
Prior to Memphis, Calhoon worked in Minor League Baseball. In 1993, he was the Head Athletic Trainer for the Everett Giants of the San Francisco Giants farm system. He held the same position in 1992 with an affiliate of the Milwaukee Brewers, the Stockton Ports.
Calhoon has twice served as the Athletic Trainer for the United States All-Armed Forces women's soccer team. He accompanied the team to Rio de Janeiro, Brazil for the 2011 Military World Games, and in 2003, he travelled with the team to Warendorf, Germany for the CISM World Military Women's Soccer Championship.
Calhoon, who grew up in a Navy family and moved several times throughout his childhood, considers himself a native Kansan. He chose Fort Hayes State University in Hays, Kansas for his undergraduate education, where he attained a bachelor's degree in exercise science and athletic training in 1991.
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