Heavyweight contender Jarrell "Big Baby" Miller has failed a second VADA test, this one for the banned substance HGH, three sources told ESPN on Friday. Miller's positive test for the banned substance GW1516 in a urine sample collected by VADA on March 20 had already cost him a shot at unified titlist Anthony Joshua on June 1 at Madison Square Garden in New York, where the state commission denied him a boxing license. ‎Miller denied knowingly taking a banned substance. The positive HGH test came in a sample collected on a different date than the March 20 sample.