[1] He was invited to the U.S. Army All-American Bowl in January 2013, where threw for a game-high 64 yards and one touchdown to lead the East team to a 15–8 win.

[3] On May 20, 2012, he committed to play college football for the Auburn over offers such as LSU, Ole Miss, Mississippi State, and Houston.

[3] Johnson stuck with his commitment through the firing of Gene Chizik and subsequent hiring of Gus Malzahn as head coach of the Tigers.

[5] On October 12, 2013, Johnson earned his first start against Western Carolina in place of an injured Marshall and had 201 passing yards with four touchdowns and an interception in a 62–3 win.

After going undrafted in the 2017 NFL draft, Johnson was invited to attend the New York Giants rookie minicamp as a tryout player.

Johnson joined the West Virginia Roughriders of the American Arena League and made his debut with the team on April 15, 2019.

He guided the team to an 8–0 regular-season record before leading them to their second straight title by beating the Raptors de Naucalpan in Tazón México VII.

[24] After helping Montgomery Catholic Prep to back-to-back state titles in 2023 and 2024, he was hired as the offensive coordinator and quarterbacks coach at Charles Henderson High School in 2025.