John Michael Johnson (born June 23, 1968, in San Antonio, Texas, USA) is a retired American bantamweight boxer He made his professional debut in 1986 and was a WBA bantamweight world champion Known as "Bam Bam," Johnson turned professional in 1986.
[1] Later that year, Johnson controversially lost the belt in his first defense to Daorung Chuvatana in Thailand.
Johnson immediately filed a protest on the grounds that the injury had been caused by a headbutt and that a technical draw should have been declared.
In 1999 he challenged Lehlohonolo Ledwaba for the vacant IBF super bantamweight title but lost by decision.
On September 29, 2014, Johnson lost an eight-round fight to Ricardo Alvarez by unanimous decision.