BRADFORD Bulls stars showed their steel by having buckets of ice water emptied over their heads for charity.
Fifteen member of James Lowes' first-team squad lined up at Odsal Stadium to take part in the ALS Ice Bucket Challenge, the craze that is sweeping the UK on social media.
The video of the challenge - which is done to raise money for motor neurone disease - has already attracted about 2,500 views on YouTube.
Bulls' media executive Ryan Sparks said the club was nominated by a girl called Lorna Phillips, and added: "We have had a good reaction to it and it has been well-received across social media channels.
"We were the first Super League team to do it as a team. We are just trying to push towards efforts that have already been done and help raise awareness."
Mr Sparks said players who took part were each making a donation to Motor Neurone Disease Association, but that he did not know how much.
A Bulls spokesman added: "The club and the players wanted to show support for the fantastic work being done to aid the research going into motor neurone disease.
"The Ice Bucket Challenge is helping to raise millions of pounds across the globe and we hope the efforts of our players, today, will go on to raise greater awareness of the disease.
"Motor neurone disease, referred to as ALS in the USA, effects a wide range of communities.
"And that is what we are here at the Bulls - a community. It would be great to now see our supporters get behind the cause and donate anything they can to the MND Association."
The challenge has helped ALS (Amyotrophic Lateral Sclerosis) Association in the US raise more than $80million and the UK's MND Association raise more than £1m.
Part of the ice bucket challenge is to nominate others to do it. Bulls nominated South Sydney Rabbitohs, Bradford City and the team from Rugby AM.