The Brazilian featherweight, who tapped Damon Jackson in the first round in Goiania, Brazil, on May 30, has tested positive for the diuretic hydrochlorothiazide, and his victory was overturned to a no contest, Brazilian MMA Athletic Commission (CABMMA) announced Thursday.
Jason received a nine-month suspension, and will likely lose his $50,000 'Performance of the Night' bonus.
According to CABMMA, the other 23 fighters who competed at the event tested clean for banned substances.
UFC Fight Night 67 took place May 30 at the Goiania Arena in Brazil. In the main event, Carlos Condit defeated Thiago Alves via TKO.