Johnson began fighting at the age of 10, after his father's fatal heart attack. The incident made Johnson want to exert his anger physically. Johnson was a three-sport varsity athlete at Marquette High School in Chesterfield, Missouri. Johnson later received a full scholarship to play football at Central Methodist University, but transferred after one year to Meramec Community College where he was one of the top NJCAA wrestlers in the country. Now, Johnson fights professionally as a mixed martial artist under the UFC.