"I did not knowingly take a banned substance," Tinordi said in a statement. "I understand, however, that I am responsible for what enters my body as a professional athlete and I accept the suspension. I will work hard towards my return to the ice and will learn from this frustrating setback."
Tinordi, 24, has played in 10 games this season for the Coyotes and Montreal Canadiens. He was acquired by Arizona in January as part of a three-team trade involving the Nashville Predators. He has six assists over three seasons in the league.