He coached at the high school level and also trained U.S. 800 - meter champion Khadevis Robinson .
One of the great 800 - meter runners in U.S. history , Johnny Gray turned to coaching .
Johnny Gray coached at the high school level and also trained U.S. 800 - meter champion Khadevis Robinson .
One of the great 800 - meter runners in U.S. history , Johnny Gray turned to coaching .