He was drafted by the New Orleans Saints in the sixth round of the 2013 NFL Draft. He played college football at Tarleton State. College Johnson is only the fourth player from Tarleton to be drafted by the NFL, and as the 183rd overall pick he is the highest NFL draft pick in school history.
As a senior he was Lone Star Conference defensive lineman of the year, and was chosen for several Division II all-America teams.
Before Tarleton, he spent two years at Kilgore College. He caught the Saints" attention with a strong performance at the Texas vs The Nation all-star game.
Professional New Orleans Saints
Johnson spent the entire 2013 regular season on the Saints practice squad, but was promoted for the teams divisional round playoff matchp against the Seattle Seahawks, Johnson was inactive for the game. The Saints released Johnson on August 26, 2014.
New England Patriots
On December 31, 2014, the New England Patriots signed Johnson to a future/reserve contract.
After impressing many in the preseason Johnson made the Patriots 53-man roster for the start of the 2015 NFL season, he appeared in his first game as a pro and recorded his first tackle in the Patriots week two victory against Buffalo. On October 28, 2015 he was placed on the reserve/non-football injury list due to an illness, ending his 2015 season.