The final boom may have been lowered on Jon Jones ’ career on Tuesday when officials announced the UFC light heavyweight champion also had a banned substance in his drug-test B-sample . Jones (23-1 MMA, 17-1 UFC) was notified of a potential violation by the U.S. Anti-Doping Agency (USADA) this past month following his title-winning knockout of Daniel Cormier at UFC 214 in July.
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