Joakim Noah has been suspended 20 games for violating the NBA's anti-drug program.

Noah tested positive for an over-the-counter supplement that is prohibited under the outgoing Collective Bargaining Agreement.

Noah hadn’t “knowingly or willingly” violated the policy and cooperated fully with the league’s probe, league sources said.

Noah's suspension will begin once he's cleared to play after undergoing surgery on his left knee on Feb. 27th.