Joe Warren has been suspended 90 days pending a formal investigation into a positive drug test for marijuana, the Texas Department of Licensing and Regulation confirmed to MMAjunkie, and the former champ could face up to one year away from the sport.

Warren has requested the “B” sample from his post-fight test at this past month’s Bellator 143 event to also be tested, TDLR spokesperson Susan Stanford confirmed.

Reached for comment, a Bellator spokesperson sent the following statement to MMAjunkie: “The Texas Combative Sports Program has notified us that Joe Warren tested positive for marijuana metabolites following Bellator 143, and as a result will be subject to a suspension and a fine, pending a hearing. We here at Bellator MMA stand behind the commission 100 percent in this process.”

On Friday, it was revealed Warren had 53 ng/ml of marijuana metabolites in his system from a urine test administered after his unanimous decision over L.C. Davis (12-5 MMA, 10-4 BMMA) on Sept. 25 at State Farm Arena in Hidalgo, Texas. The commission’s limit is 50 ng/ml, which is one-third the threshold of 150 ng/ml mandated by the World Anti-Doping Agency (WADA).

A records request for Warren’s fight-night testing results is pending.

Stanford said a complaint has been filed against the ex-champ. If a violation is found, he could face either a one-year probated suspension, meaning he can still fight in the state provided he doesn’t break any rules, or a full one-year suspension. He also faces a fine of up to $5,000.

Warren’s win over Davis was his first since a submission loss to Marcos Galvao at Bellato 135 that cost him the Bellator bantamweight title. The former featherweight champ also tested positive for marijuana during his wrestling career, drawing a two-year ban from the U.S. Anti-Doping Agency.

In a 2013 interview with MMAjunkie, Warren admitted he maintained a medical marijuana license in two states; he resides in Colorado, where the drug is legalized for recreational use.

Warren was reportedly under consideration for a short-notice title rematch against Galvao prior to news of his recent drug failure.

For additional coverage of Bellator 143, check out the MMA Events section of the site.