Gennady Golovkin boxes.
BoxRec or boxrec.com is a website dedicated to holding updated records of professional boxers , both male and female . Gennady Golovkin . As of May 2017 , he is ranked as the world 's best middleweight by BoxRec and the Transnational Boxing Rankings Board , and second best by The Ring . The Ring magazine Pound for Pound is the official list of the current pound for pound professional boxing rankings distributed by The Ring magazine . The Transnational Boxing Rankings Board ( TBRB ) is an all-volunteer initiative formed in October 2012 with the intention of providing professional boxing with authoritative top-ten rankings , identifying the singular world champion of every division by unbiased reasoning and common sense , and to insist on the sport 's reform .