In 17 years as a professional conditioning coach, Warriors head trainer Carl Jennings has seen no evidence of institutionalised doping in rugby league.
Jennings, a former British shotput champion, said no player he had been involved with had ever failed a test for performance enhancing drugs. The idea that doping at some clubs could be systematic was beyond belief.
"I can't believe that. I literally can't believe that," Jennings said.
"The NRL, from my experience, is a really nurturing, positive, trusting environment. So when things like this pop up it is really concerning."
The Warriors have not been implicated in the doping investigation that has shocked Australian sport. However Penrith and Canberra - clubs Jennings and head coach Matthew Elliott have previously worked at - are among the six NRL clubs now under investigation by USADA following an Australian Crime Commission investigation that uncovered links between organised crime and doping.