Chambers has never played rugby league before

Controversial sprinter Dwain Chambers has joined Super League strugglers Castleford on a one-month trial.

Chambers, who served a two-year drugs ban in athletics and has never played the sport before, will also help with sprint training and community work.

Tigers coach Terry Matterson said he had not been involved in the decision.

"I don't know much about it. I haven't dealt with it at all. All I'm worried about is the team and it hasn't got a hell of a lot to do with me," he said.

Live: Dwain Chambers news conference

"I know a little bit about him but I'd rather not comment on it."

Chambers, 29, won a silver medal in the 60m at this month's World Indoor Championships, but is banned from running in this year's Olympics because of a British Olympic Association by-law.

He may still appeal against that ruling in an attempt to make the British squad for Beijing.

Castleford have been accused of signing Chambers as a publicity stunt, but the club have defended their decision.

I'm not doing this for a laugh Dwain Chambers

"Whatever the outcome of the trial, which we believe can be successful, we gain from his time with us," said Castleford manager Michael Robinson.

"It won't impact upon any plans that we have to strengthen the side with established players, should they become available.

"Obviously we are well aware of Dwain's background and we gave the whole situation a great deal of thought.

"However, like people in our own sport, he has been punished and taken that punishment. That is now behind him and he is serious about trying to make the grade in rugby league and he clearly already has the pace," he added.

606: DEBATE Give your reaction to the signing of Chambers

Chambers spent a brief spell playing American Football after his athletics suspension ended before the NFL Europe league was disbanded.

Speaking about his rugby league trial on Sunday, Chambers admitted that he needed to start earning money.

"I'm not doing this for a laugh," he said.

"The fact is I have to earn a living for myself, my fianc�e and my baby boy. Both Castleford and I are keen for this to work."

Former rugby league great Martin Offiah believes that Chambers does stand a chance of making the grade in league - if he has the right support.

"It all depends on how much Dwain himself wants it to happen," Offiah told 5 Live's Sportsweek.

"If they've got an intelligent centre then obviously Dwain Chambers is far faster than I ever was, and I managed to score a quite a lot of tries, so who knows what could happen.

"There have been a lot of wingers in the past who haven't been the most gifted footballers but were very fast."