BLOEMFONTEIN – South African 2019 World Cup winner Sibusiso Nkosi has been banned for three years by World Rugby after testing positive for an anabolic steroid, his club Cheetahs said on Monday.”Sbu had a World Rugby test in May and his A sample was positive. He has been banned for three years,” a Cheetahs official, who requested anonymity as he is not an official spokesman, told AFP.His sample showed traces of an anabolic steroid used by body builders and, according to South African media reports, the suspension will run until July 15, 2027.The 28-year-old winger, who understudied…