** FILE ** Toronto Argonauts running backs Ricky Williams, left,m and John Avery talk about a play on the sidelines during pre-season CFL action against the Hamilton Tiger-Cats in Toronto, in this June 2, 2006 file photo. Williams tested positive again for marijuana last month, delaying his return to the league until at least September, a person familiar with the case said Friday. Williams sought to end a one-year drug suspension last month when he asked to rejoin the Miami Dolphins. But following the positive drug test, clinicians in the program advised NFL commissioner Roger Goodell to delay reinstatement, the person close to the case said. (CP Photo/Adrian Wyld) Canada