Gennady Golovkin boxes.
Gennady Golovkin . In 2016 , he achieved his 17th title defense by knockout , which equalled the record set by Wilfredo Gómez in 1982 . An interim championship is an alternate title that is awarded by the four major sanctioning bodies of professional boxing ( WBA , WBC , IBF , and WBO ) , and in other combat sports such as kickboxing and mixed martial arts . A knockout ( abbreviated to KO or K.O. ) is a fight-ending , winning criterion in several full-contact combat sports , such as boxing , kickboxing , muay thai , mixed martial arts , karate , some forms of taekwondo and other sports involving striking . The Ring magazine Pound for Pound is the official list of the current pound for pound professional boxing rankings distributed by The Ring magazine . Wilfredo Gómez Rivera ( [ wilˈfɾeðo ˈɣomes ] ; born October 29 , 1956 ) , sometimes referred to as Bazooka Gómez , is a Puerto Rican former professional boxer and three-time world champion .