Johnson played college basketball for Florida State before being selected 45th overall in the 2006 NBA draft by the Indiana Pacers.

Johnson attended Dougherty Comprehensive High School in Albany, Georgia and played collegiately at Florida State for three seasons.

[1] A tough, athletic inside player with a 40-inch (1,000 mm) vertical leap,[2] he averaged 13.2 points, 7.4 rebounds and 1.0 block per game for the Seminoles during the 2005–06 season, his last.

[6] In the team's second game of the 2012–13 CBA season, Johnson tallied a double-double by scoring 23 points and grabbing 11 rebounds.

[7] He continued his form by tallying another double-double (21 points, 10 rebounds) in a road loss to the Shandong Lions.