AFL chief executive Gillon McLachlan disagrees with suggestions that West Coast's 2006 premiership flag is tainted.
After a Herald Sun report revealed the extent of the Eagles' drug culture during those years, McLachlan confirmed on 3AW there was no evidence suggesting the Eagles ever took performance-enhancing drugs.
Former ASADA boss Richard Ings, who was the man in charge in 2006, said earlier this week that every West Coast and Sydney player was drug tested after the grand final and no player returned a positive result.
"There has never been any allegation or any evidence of anything related to performance-enhancing drugs," he told 3AW.
"The players were tested and Ben Cousins was target tested on match-day and they never tested positive to any form of drug."
Following the revelation of the recent Gillard report, the AFL were criticised for not taking action against the Eagles, but McLachlan believes there wasn't enough evidence to do so.
"The recommendation of the Gillard report to the (AFL) Commission was there was not enough evidence to charge the club with conduct unbecoming," McLachlan said.
"That was the conclusion and the recommendation by the independent judge."
The AFL chief also defended Ben Cousins' 2005 Brownlow Medal win, stating that his post-career antics don't take away from that award.
"No, I don't (think it's tainted). I understand the theory but he was target tested, he was heavily scrutinised," he said.
"The facts are the club was target tested, he was target tested and he never failed a test. After that there is a lot of speculation in that."
