ゲンナジー・ゴロフキン
Johnathon Maurice Banks (born June 22, 1982) is an American former professional boxer who competed from 2004 to 2014. He held the IBO cruiserweight title from 2008 to 2009 and challenged once for the IBF cruiserweight title in 2009. He currently works as a boxing trainer, most notably for former heavyweight champion Wladimir Klitschko, and was himself trained by the late Emanuel Steward. He is currently coaching Gennady Golovkin.