Watts, 26, was accused of biting a rival player during the Tugun Seahawks’ preliminary final win over Bilambil Jets on September 1.
A Gold Coast-Tweed rugby league judiciary hearing found him guilty of the offence, having viewed video footage of the footage that shows the Jets player reeling away in pain after clashing with Watts, and then showing the damage to a referee.
The Australian managed just 10 minutes on the field during his spell at Widnes, suffering a torn right anterior cruciate ligament on his debut against Salford.
He did sign a new deal with the Vikings for the 2013 season in May 2012, but was released a week later, amid reports that he was arrested and found with drugs.
The ex-Sydney Rooster and North Queensland player has since given up on a return to the NRL, and recently joined the notorious Finks bike gang Down Under.