Johnson was born in Pensacola, Florida. He attended Pine Forest High School in Pensacola, where he was a good student with a perfect 4.0 GPA and a 27 on the ACT exam. He played high school football for the Pine Forest Eagles. Considered a four-star recruit by Rivals.com, Johnson was listed as the No. 17 offensive tackle prospect in the nation.[2]
Johnson was drafted 98th overall in the third round of the 2010 NFL Draft by the Atlanta Falcons. On June 19, the Falcons signed Johnson to a deal.[3] He played two games in 2011 spending most of the season on injured reserve. He played 16 games in 2012 as 2nd string guard and a blocking tight end on goal line/short yardage situations.[4] Johnson, who went into the preseason as the projected starter at right tackle, suffered a fractured fibula and dislocated left ankle on August 6, 2013, and was placed on injured reserve three days later.[5]