Report: Jarrell Miller tests positive for banned substance
Mike Stobe / Getty Images Sport / Getty

Heavyweight contender Jarrell "Big Baby" Miller has tested positive for the banned substance GW1516 just weeks before his June 1 bout with Anthony Joshua at Madison Square Garden, sources told ESPN's Dan Rafael.

The test results came from a random urine test submitted March 20, Rafael reports.

The 23-0-1 heavyweight is scheduled to challenge for Joshua's WBA, WBO, IBF, and IBO titles.

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Report: Jarrell Miller tests positive for banned substance
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