Fox 31 reported Friday the NFL has had a "rash" of positive tests under the league's policy regarding anabolic steroids and related substances.

Citing a "highly-placed NFL source," the station reported that there have been as many as 10 positive tests, resulting from players taking water pills in an effort to lose weight.

The NFL could not be reached for comment.

The report said among the players with positive tests were running back Deuce McAllister and defensive end Will Smith of the New Orleans Saints.

The substance in question is Bumetanide, a drug which can mask the presence of other substances, including steroids.

Under the league's policy regarding anabolic steroids and related substances, a first violation results in a four-game suspension.