Known as "Boom Boom", Johnson turned pro in 1986 and in 1991 challenged Manuel Medina for the IBF Featherweight Title, losing a technical decision. In 1993 he rematched Medina and was able to win the title with a narrow split decision victory. Johnson was able to successfully defend the title 11 times before losing the belt to the young phenom Naseem Hamed via 8th round TKO. Johnson never challenged for a major title again, and retired in 2002 after being TKO'd by Jorge Páez.
| IBF Featherweight Champion
26 Feb 1993– 8 Feb 1997
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