Cullen hopes Morley can help Wolves challenge for the title

The prop, 29, spent six years in Australia, where he was considered one of the sport's toughest forwards.

And Cullen says Morley's impact will be similar to Australian great Andrew Johns, who played for Wolves in 2005.

"We've already seen the effect of Adrian's arrival," said Cullen. "It's almost the Andrew Johns phenomenon."

Adrian is a very dominant character and is up there with the very, very best Paul Cullen

Johns, recognised as one of the game's legends, guested at Warrington for a month in 2005 and captured the imagination of the Cheshire town, resulting in inflated attendances and increased media coverage.

Great Britain international Morley also joins the club with a fine reputation, and Cullen insists his poor disciplinary record will be no barrier to him enjoying success at Warrington.

"We know what we've bought in Adrian. He's a very dominant character and is up there with the very, very best," he said.

"We're not looking to change his game in any way, shape or form. We simply want to provide the environment that he can express himself in.

"I'm very excited by the way pre-season has gone and the potential we have for this year. If there are any wrongs to be set right from last year, we now have the personnel to do it.

"The training sessions step up a couple of gears because of the quality of personnel you are now working with. Our guys have got smiles on their faces, they're enjoying the training routines."