They always test mixed martial arts (MMA) fighters for marijuana ... maybe they should start testing the referees, too.

Especially when they admit to having slow reaction times!!!

Veteran man in black and longtime fixture of Ultimate Fighting Championship (UFC) officiating, Josh Rosenthal, plead guilty to conspiracy to manufacture and distribute marijuana and possession with intent to distribute and will now face the music in U.S. District Court on May 17, 2013.

From MMA Junkie:

One year ago, federal agents raided an Oakland, Calif., warehouse owned by Rosenthal and an associate that contained 1,356 marijuana plants, according to a copy of the agreement, which MMAjunkie.com obtained from the U.S. District Attorney's office in Oakland. The drug's street value was estimated at more than $6 million.

Yikes.

According to the report, the prosecution is "recommending 37 months in jail, fines and five years of probation, during which he would be subject to random searches." Sounds kind of mean for the green, but it sure as hell beats the possible 10-to-life and $10 million fine he faces without a deal.

I think it's safe to say we won't be seeing him inside the Octagon for awhile.