After the Klitschko fight, Johnson staged a comeback. He knocked out Mexican heavyweight Gilbert Martinez in July 2004 and won a technical decision over Cuban Yanqui Díaz in June 2005, although he lost his next bout (later changed to a technical decision) against Californian Javier Mora in March 2006. Mora appeared to have accidentally stepped on Johnson's foot, causing Johnson to dislocate his knee. This decision was subsequently appealed and the result changed to a No Decision. Johnson has since recovered from his knee injury.