Muhammed "King Mo" Lawal, the former Strikeforce light heavyweight champion who returned to the cage on Jan. 7, may not be back in the cage any time soon after testing positive for a banned steroid.

Lawal tested positive for Drostanalone, the Nevada State Athletic Commission announced today.

Drostanalone can be used as a medication for lowering cholesterol and is sometimes prescribed to cancer patients, but it is also used as a performance-enhancing substance. It is particularly known as a steroid that athletes and bodybuilders use when they are attempting to maintain strength and muscle mass while cutting weight.

The Nevada Commission did not say what discipline Lawal will face, but fighters who test positive for performance-enhancing drugs typically have their license suspended for anywhere from six months to a year. Lawal's TKO victory was viewed as likely to earn him another shot at the Strikeforce light heavyweight title, but that apparently won't happen now.

Lawal is the second well-known Strikeforce fighter to fail a performance-enhancing drug test recently. Cris Cyborg, the promotion's 145-pound female champion, also tested positive for steroids at her most recent fight.

The Nevada Commission announced that all the other fighters who took part in the Jan. 7 Strikeforce show tested negative for all banned substances.