Last week Neath back - row Lee Evans was banned for two years after he was found to have taken the anabolic steroid drostanolone - .
UKAD director Graham Arthur said there was some evidence to support back - row 's claim that back - row had not knowingly taken the banned substance .
Last week Neath back - row Lee Evans was banned for two years after he was found to have taken the anabolic steroid drostanolone - although UKAD director Graham Arthur said there was some evidence to support Evans 's claim that he had not knowingly taken the banned substance .