The engage Super League strugglers say they saw encouraging signs during the controversial athlete's month-long, unpaid trial, but do not have time to spend grooming him for the sport.

Chambers, 30, who experienced his first taste of rugby on the wing in a specially-arranged reserve grade game against York City Knights nine days ago, must now hope that clubs outside Super League saw enough potential to make him an offer.

"He is in discussions with other clubs," said Chambers' agent, Ron Hill. "But it's got to be right from day one. It was all a bit rushed last time.

"He has had one or two clubs contact him, but it's got to be full time.
Potential

"Dwain needs six months in the reserve grade and a full pre-season to learn about the game.

"We know he's mentally tough and he's got speed. He has come a long way in a short time and I think what we've seen in a month is enough to show that there is potential."

Chambers, shunned by athletics since his return from a two-year drugs ban, spent 39 minutes on the field in four spells of last month's friendly match and clearly struggled to cope with the stamina needed to play the 13-man game before eventually retiring with a shoulder injury.

Tigers chief executive Richard Wright said: "Many people watched Dwain in the trial game and he has certainly won over some of the doubters and proved that the trial was more than a publicity stunt.

"During his trial period Dwain has been a joy to have around. His work ethic and professionalism have been exemplary.

"He has got on well with all members of staff and has been in great demand, proving a popular visitor to local schools.

"He has also given us a huge media profile. I believe that he feels that he has gained from his time with us, so there are no losers.

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

"All the club wish Dwain the very best for the future in whatever path he chooses to follow."

Chambers' manager Nick Collins said: "While disappointed Dwain understands the decision.

"He has had a great time and made some good friends during his brief period with the club. He leaves in a positive mood and with a smile."
It is the latest twist in the career of the London-born sprinter who had been keen to earn a deal with Cas worth a reported £60,000.

In October 2003, Chambers was revealed to have tested positive for the banned anabolic steroid THG. He was given a two-year ban by UK Athletics in February 2004, backdated to August 2003.

He was also banned for life from the Olympics and stripped of the medals he had won since 2002 after admitting that he had taken THG from that date.

The International Association of Athletics Federations also asked Chambers to return the prize money, believed to be over £100,000, that he won during this period, but he is still hopeful of overturning the Olympic ban.