An American football fullback for the Tennessee Titans of the National Football League. He was drafted by the Green Bay Packers in the fifth round of the 2009 NFL Draft. He played college football at LSU.

He has also played for the Denver Broncos.

Johnson attended West Saint John High School in Edgard, Louisiana, where he was a member of the Rams 2003 2A State Championship team.

Johnson was selected in the 5th round (145th overall) of the 2009 NFL draught by the Packers.

On September 3, 2011, Johnson was traded to the Tennessee Titans. He was released on October 7, 2011 to make room on the roster for fullback Ahmard Hall who was returning to the team from a four game suspension.

On October 10, 2011, the Denver Broncos received Johnson off of waivers from the Tennessee Titans. Johnson was then waived by the Broncos and the Tennessee Titans claimed him off of waivers.