The NRL are yet to rubber stamp the 26-year-old New Zealand international’s Warriors deal following his release from Parramatta and revelations of his friendship with gambling identity Eddie Hayson.

“I have seen him when he was at quite a low and I have seen him get better continuously,” Doyle told Fox Sports.

“He is certainly getting better every week.

“He is returning back to what he was when I used to know him a few years ago. But it will take a bit of time.”

And with pre-season training set to start next month, Doyle is confident the Manly premiership-winner will be able to hit the paddock.

 “I would assume so,” Doyle said. “I spoke to the NRL about that because it has happened in the past.

“Blake Ferguson trained with the Roosters before he was registered. That certainly shouldn’t be an issue. But again, because of his (shoulder) injury he won’t be doing too much in pre-season other than doing his rehab.”