Heavyweight Jarrell Miller has tested positive for two more banned substances in a third drug test, sources told ESPN. In addition to Tuesday’s positive test for the banned subtance GW1516 from a March 20 urine sample given to VADA and for HGH from a March 31 blood test, Miller also gave urine during the March 31 collection and that sample came back later Friday. It was positive for EPO and again for GW1516. He was due to challenge Anthony Joshua for his unified heavyweight title on June 1.