Grimes served as a volunteer assistant coach for two seasons at Maryland from 2005-07. In the jumps and sprints, he coached three All-Americans, two Atlantic Coast Conference champions, one ACC record holder, one IC4A title-winning relay and several NCAA regional qualifiers. In just two seasons, his athletes had a hand in shattering five school records.
A 1981 graduate from the University of Tennessee, Grimes earned All-America honors seven times during his career in the sprints and long jump and was crowned Southeastern Conference champion three times. Following his collegiate career, Grimes went on to post the world's second-best ranking in the long jump between 1982-83, soaring a remarkable distance of 28'2". He would rank among the top-five long jumpers in the world for five-straight years between 1981-85. Grimes went on to earn a Silver Medal at the 1983 World Championship in Helsinki, Finland, and served as an alternate on the 1984 U.S. Olympic Team.
Grimes resides in Bowie, Md., with his wife, Phyllis, and his children, Jason II, Janea, Jay and Kennedy.