Former champion Bute to have B-sample tested after positive for banned Ostarine

MONTREAL – Former champion Lucian Bute of Montreal will have the B-sample tested from his positive result in May for the banned substance Ostarine, the World Boxing Council announced Wednesday.

Bute 36, tested positive after losing an April 30 bout by majority decision against super-middleweight champion Badou Jack on April 30 in Washington, D.C. The B-sample will be tested Thursday and a second positive result would likely result in a suspension.

The WBC was notified May 27 that Bute’s post-fight urine sample turned up Ostarine, which is not a steroid but acts like one in increasing endurance and muscle mass. It was been on the World Anti-Doping agency’s banned list since 2008.

Bute has denied using banned substances and expressed confidence that the B-sample would prove it.

“The WBC and the D.C. commission have communicated frequently about that case,” the fight sanctioning body said in a statement. “Mr. Bute has designated his representatives who will attend the opening of the “B” sample container, consistent with the WBC Rules and Regulations. More information about this case will be made available in days to come.”

Bute held the IBF super-middleweight title from 2007 to 2012, defending the belt nine times.