Ken Shamrock and Kevin “Kimbo Slice” Ferguson tested positive for the same steroid following their appearances at Bellator 149 this past month.

Shamrock (28-17-2 MMA, 0-2 BMMA), 52, and Slice (6-2 MMA, 2-0 BMMA), 42, were found with the steroid nandrolone, according to urine test results released by the Texas Department of Licensing and Regulation, which oversees the Texas Combative Sports program that oversaw the Feb. 19 event at Houston’s Toyota Center.

Shamrock also tested positive for methadone, a synthetic opioid used to treat heroin addicts, following his first-round TKO loss to Royce Gracie in the event’s Spike-televised headliner.

Shamrock and Slice each face up to a one-year suspension and $5,000 fine. The TDLR is offering the fighters a settlement – good until March 31 – for “coming into compliance” that offers a reduced punishment of a $3,000 and a license revocation, records show. Compliance equates to the fighters explaining their side of the story to the commission, TDLR Susan Stanford told MMAjunkie.

In Bellator 149’s co-headliner, Slice stopped Dhafir “Dada 5000” Harris via third-round TKO in a sloppy bout in which both fighters quickly became exhausted. Harris afterward was given oxygen and transported to an area hospital, where he suffered renal failure from dehydration.

MMAjunkie earlier this month made a public records request following initial confirmation that the fighters failed post-fight drug tests. Bellator officials did not immediately return a request for comment.

The testing results confirm both Shamrock and Slice had elevated testosterone-to-epitestosterone (T/E) ratios, with the former 12.4-1 and the latter 6.4-1. The normal ratio for most men is 1-1, though the Texas commission allows a 4-1 ratio.

The heavyweight fighters, who fought each other this past June with Slice winning via first-round TKO, were tested on the night of the event. Shamrock’s sample was collected at 7:05 p.m. CT local time and reported on March 1, while Slice’s sample was collected at 7:32 p.m. and reported on March 2.

Shamrock appealed the TKO result of his fight with Gracie to the commission, arguing he was incapacitated by an illegal blow that was missed by the bout’s referee. The appeal is still pending.

It was Shamrock’s second failed test after a trio of steroids were found in his system following a 2009 bout in California.

For complete coverage of Bellator 149, check out the MMA Events section of the site.