Bellator MMA middleweight Doug Marshall (18-7 MMA, 4-1 BMMA) failed a post-fight drug test following a knockout loss to champ Alexander Shlemenko (49-7 MMA, 10-1 BMMA) at this past month’s Bellator 109, according to a brief from TheMMAReport.com.

Marshall tested positive for an undisclosed banned substance and is suspended for an unknown period of time, the head of Pennsylvania’s athletic commission told the website.

A source familiar with the administrative action today told MMAjunkie that Marshall is suspended until Feb. 7 and must pay a fine, as well as retake a test, though the type of test is unknown.

As with most major state athletic commissions, the Pennsylvania State Athletic Commission tests for performance enhancers and drugs of abuse.

PSAC Executive Director Gregory Sirb and Marshall could not be reached for comment.

“Greg Sirb at the Pennsylvania State Athletic Commission operates one of the best commissions in the country,” Bellator CEO Bjorn Rebney stated in a prepared release. “Doug Marshall will have to adhere to any and every penalty that the Pennsylvania Commission delivers.

“When competing at the highest level, fighters are expected to train and prepare for their fights according to the rules and should fully expect to be tested at every Bellator event.”

Marshall, who won the Bellator Season 8 middleweight tournament, was stopped with a body shot from Shlemenko at the Nov. 22 event, which aired live on Spike TV and took place at Sands Bethlehem Event Center in Bethlehem, Pa.

Marshall and Shlemenko originally were scheduled to meet in September at Bellator 98, but Marshall withdrew with a broken hand. Season 8 finalist Brett Cooper, whom Marshall knocked out in the finals, stepped in as an injury replacement and lost a decision to the Russian champ at the Sept. 7 event.

Prior to Bellator 98, Marshall, nicknamed “The Rhino,” obtained a therapeutic-use exemption for testosterone-replacement therapy, according to Michael Mazzulli, the head of the Mohegan tribal commission that oversaw the event in Uncasville, Conn.

A former WEC champion, Marshall made his Bellator debut in November 2012 with a knockout of Kala Hose at Bellator 82. He went on to win the Season 8 tournament.