10/28/2014 03:32 EDT | Updated 12/28/2014 05:59 EST

AHL suspends Binghamton forward Brad Mills 20 games for violating drug policy

SPRINGFIELD, Mass. - Binghamton Senators forward Brad Mills has been suspended for 20 games for violating AHL's performance-enhancing drug policy.

The league did not say what drug Mills tested positive for.

He has already served the first four games of the suspension as he was removed from the Senators lineup after reporting his positive test result to team management last week.

He hasn't played a game this season.

Mills will be eligible to return to play on Dec. 12, 2014.