Which South African professional boxer did  Cedric Kushner managed
Cedric Kushner Cedric Kushner (July 18, 1948 – January 29, 2015) was a South African-born American boxing promoter and manager. In the late 1990s he was one of the most significant promoters in the sport. Boxers he promoted and/or managed included Hasim Rahman, Shannon Briggs, Oleg Maskaev, Chris Byrd, Corrie Sanders, Ike Ibeabuchi and David Tua.
Joshua Onyango Joshua "Poison" Onyango ( (1975--) 01 1975 (age (2017)-(1975)-((11)<(12)or(11)==(12)and(30)<(01)) ) ) born in Kisumu, is a Kenyan professional welter/light middle/middleweight boxer of the 1990s, 2000s and 2010s who won the Kenya welterweight title, East & Central African Professional Boxing Federation welterweight title, and Commonwealth light middleweight title, and was a challenger for the International Boxing Federation (IBF) Inter-Continental light welterweight title against Sergey Bashkirov, his professional fighting weight varied from 144 lb , i.e. Welterweight to 160 lb , i.e. Middleweight.