Williams fails another drug test

NEW YORK, May 11 (UPI) -- Former Miami Dolphins running back Rick Williams tested positive for marijuana and cannot seek re-instatement into the NFL until September.

ESPN.com reported Friday the former first-round draft pick tested positive in April.

If substantiated, it would be his fifth violation of the substance-abuse policy and likely means his playing days as a Dolphin are over.

Williams left the team after a league suspension in 2006. Other suspensions came in December 2003, July 2004 and December 2004.

Just last month, Williams told ESPN Radio he had not smoked marijuana in "maybe three years."

In that interview, Williams said he thought he had "a pretty good shot" at being reinstated.

Neither the Dolphins nor the league, through spokesman Greg Aiello, had any comment, citing the confidentiality of a player's status in the substance-abuse program.

Williams has rushed for 7,097 yards in six NFL seasons.