Doncaster centre Shaun Leaf has been given an 18-month ban and fined £500 by the Rugby Football League.
The RFL found Leaf, 22, guilty of betting against his own club in games with Toulouse in August 2009 and Wakefield in May 2011.
He was also found guilty of betting on other games including Gateshead versus Harlequins and Wigan against Barrow.
The suspension will commence from the date that Leaf's provisional suspension began, on 12 May 2011.
Leaf was found not guilty of providing privileged information to a third party to assist in betting activity; seeking to influence improperly the result and engaging in a conduct that was corrupt or fraudulent.
It is not the first time that a player has been suspended for betting-related offences.
Martin Gleeson and Sean Long were found guilty of betting against their team St Helens before a game against Bradford in 2004 and were banned for four and three months respectively.