[3] On April 18, 2008, at the Buffalo Run Casino in Miami, Oklahoma, Johnson defeated Terry Smith by unanimous decision.

Johnson scored the biggest win of his career with a TKO victory over a badly faded Bruce Seldon in September 2008 in Atlantic City.

Johnson was declared winner by technical knockout after Vargas's corner threw in the towel early in the sixth round.

The previously unbeaten Johnson was unable to land his trademark jab on the 6 ft 7in Vitali, and went on to lose every round of the contest to the Ukrainian.

After the loss to Klitschko, Johnson racked up victories against Charles Davis and Julius Long before signing up for in Eddie Hearn's Prizefighter tournament in the UK.

Johnson would settle in a gatekeeper role after the tournament, dropping decisions to Tyson Fury, Christian Hammer, Manuel Charr, and Derek Chisora, but beating Solomon Haumono.

[8] Five consecutive losses later, Johnson scored a seventh-round knockout victory against former IBF and The Ring cruiserweight champion Yoan Pablo Hernández on August 22, 2020.