Johnson attended Peabody High School in Pittsburgh, Pennsylvania, where he was a member of the football team.
As a senior in 2007, Johnson was named 1st Team All-Mid-States Football Association as a tight end.
[7] He has played, or signed with the Tulsa Talons, Kentucky Horsemen, Marion Mayhem, Canton Legends, Rock River Raptors, San Angelo Stampede Express, Utah Blaze, Huntington Hammer,[8] Harrisburg Stampede, Erie Explosion, Abilene Bombers, Cape Fear Heroes, Marion Blue Racers, In 2011, LaRoi Johnson Posted 45 receptions for 450 yards and 9 touchdowns.
In October 2012, Johnson signed with the Abilene Bombers in the Lone Star Football League (LSFL).
[9] In March 2014, Johnson signed with the Cape Fear Heroes in the American Indoor Football League ( AIF).