He was selected by the San Diego Chargers in the fourth round of the 2009 NFL draft.
As a senior at Miami Springs High School in 2003, he was Dade County's leading rusher with 1,649 yards and accounted for 18 touchdowns.
For his performance, he earned all-Conference and all-State honors and also holds Miami Springs High's single-season rushing record, especially significant considering that Miami Springs was also the high school attended by Willis McGahee, Mitch Green, Jon Lewis, Dwayne Hadley, and Freddie Myles.
He ended his five-year career at CSU with an outstanding 2008 campaign for which he received first-team All-MWC honors.
[5] Johnson was selected by the San Diego Chargers in the fourth round (134th overall) of the 2009 NFL draft.