The 22-year-old former Leeds junior was a member of Rovers' promotion-winning team two years ago and was already contracted to the end of next season.

Murrell, who has not played since May because of a shoulder injury, said: "It's been frustrating having to watch week after week from the sidelines, I can't wait to get back to playing.

"It's great to know that I will be part of a club that has secured a three-year Super League licence."

Rovers coach Justin Morgan said: "Scott is a good player to build a team around.

"It's excellent news that he has agreed to stay with us for a further three years and shows that he is a player that is settled and is ready to commit to the club."

Meanwhile, Warrington have given prop forward Paul Rauhihi a new contract for 2009 which will see the veteran New Zealander playing beyond his 36th birthday.

The former North Queensland Cowboy, who at 35 is only three years younger than head coach James Lowes, has enjoyed a vintage third season with the Wolves, who are pushing for a fourth-place finish in the engage Super League.

"He's had a good year for us and his reward is an extension to his contract, which he fully deserves," said Lowes.

Catalans Dragons second-rower Jason Croker, who is seven months older than Rauhihi, is the oldest player in Super League.

Warrington have also given a new deal for next season to 22-year-old prop Steve Pickersgill and exercised 12-month options on the contracts of winger Chris Riley, 20, and forward Mike Cooper, 19.