Sandor Earl has been banned from playing in the NRL until 2017 after being handed a four-year suspension for breaching the league's anti-doping policy.
The NRL announced on Wednesday the former Canberra, Penrith and Sydney Roosters winger was guilty of six violations, including use and possession of growth hormone CJC-1295.
After a five-hour hearing in front of the NRL's anti-doping tribunal last month, the league also found Earl was trafficking, or attempting to move, a number of other performance-enhancing drugs.
The 26-year-old's ban is backdated to when he was stood down by the NRL on 29 August, 2013 and he has 21 days to appeal the ruling to the Court of Arbitration for Sport.
NRL head of integrity Nick Weeks said the league was committed to eliminating performance-enhancing drugs.