[2] He successfully defended the title against Izaak Cardona, winning by split decision.
[4][5] Johnson has competed against many notable opponents in non-title fights, but most ended in a loss.
He has lost to Peter Quillin, J'Leon Love, Sergio Mora, Dominic Wade, Joshua Clottey, Jermell Charlo, and Glen Tapia, while defeating Craig McEwan.
[6][7][8][9][10][11][12][13] Johnson has been a boxing sparring partner of Conor McGregor and Manny Pacquiao.
[14] Johnson has also fought twice in the UFC,[15] losing both bouts before his contract was cut by the organisation.