Johnny Buckley is a legendary Irish boxing manager and promoter from Boston, he guided which American world heavyweight boxing champion, to world boxing titles?
Johnny Buckley:  He guided Jack Sharkey, Lou Brouillard and Paul Pender to world boxing titles. Jack Sharkey: Jack Sharkey (Lithuanian: "Juozas Povilas Žukauskas" , October 26, 1902 – August 17, 1994) was an American world heavyweight boxing champion.
Jack Sharkey