Dwain Chambers, centre, refused to concede his
quest was a publicity stunt [GALLO/GETTY]
Dwain Chambers' rugby league adventure has ended.

Chambers finished a monthlong trail at Castleford Tigers rugby league club on Tuesday and his contract won't be extended.

The British sprinter, who completed a two-year ban for testing positive for the steroid THG in 2005, had tried the sport because the British Olympic Association has a lifetime ban on athletes with a serious doping violation competing at the Olympics.

"Dwain has worked very hard during training and the trial game, and he showed the commitment and courage to suggest that with time he could become a successful rugby league player,'' Castleford said in a statement.

"However, time is not available to us and we have to focus upon more immediate matters and our attention has to be on this year's Super League competition.''

'A joy to be around'

Tigers chief executive office Richard Wright said Chambers had proved his trial was more than a publicity stunt.

"During his trial period, Dwain has been a joy to have around,'' Wright said.

"His work ethic and professionalism have been exemplary.

"However, our coaching team feels that he would need a significant amount of additional time to prove whether or not he would be capable of making the grade in Super League, and time is something that we don't have.''

Chambers' manager, Nick Collins, said his client left the club "in a positive mood and with a smile on his face.''

"Whilst disappointed, Dwain is comfortable with and understands the decision,'' Collins said.

"He has had a great time and made some good friends during his brief period with the club.''

Collins didn't say what Chambers, who won silver in the 60 metres at the world indoor championships in March, would do next.

Source: Agencies