EXCLUSIVE: Why Storm rookie Jack Howarth 'questioned himself' en route to NRL stardom

He was the man at the centre of the most controversial moment in Sunday's NRL grand final.

But for Storm young gun Jack Howarth, there was a time he was doubting his dreams of playing on rugby league's grandest stage would even come to fruition.

The 21-year-old was touted as a future NRL superstar from an early age, dominating schoolboy footy and playing for the Queensland U19s side two years ago.

READ MORE: Test hopeful's nightmare start to Sheffield Shield season

READ MORE: Reserve grader called up as injury crisis hits Kiwis

READ MORE: Tragic life of league great who 'died of a broken heart'

Despite his obvious talent, Melbourne refused to rush Howarth into the top grade as he battled through injuries that put his progression on hold.

In fact, he didn't debut until round 27 last year, starting in the back-row in the Storm's win over a depleted Broncos outfit which saw a host of debutants from both teams.

It wasn't until Reimis Smith fell out of favour early this year that Howarth was afforded a regular starting spot and while it was a long time coming, the Mackay product concedes it's what prompted him towards locking down the No.3 jersey.

"I do believe that everything happens for a reason," he told Wide World Of Sports in the changerooms after Sunday's game.

"There were times I was questioning if I was good enough and I was a bit down, but honestly I wouldn't change it for the world now.

"To play in a grand final and have the type of season that I did, I'm really proud."

Finishing with four tries, 64 tackle breaks and six linebreaks in 16 appearances, Howarth showed some of his raw ability but still has plenty of room to grow.

"I just think being consistent and having the same prep each week, while also making sure my body is in a good position is a big thing," he said.

"I'll definitely nail that aspect of footy going forward."

Howarth's first taste of an NRL decider didn't exactly go to plan, but he wasn't alone as Penrith claimed a fourth-straight title in a gripping contest.

The rookie came up with three errors and had a try disallowed by the Bunker, despite remaining adamant post-game that he planted the ball down.

"I thought I got it down - I don't know what they see differently," Howarth said.

"We can't change it now, but it did hurt when that one was disallowed. It was very disappointing and a tough one to swallow.

"A few things didn't go our way and they dominated field position and when you make errors on top of that, they are going to capitalise.

"But I think the year that we had as a group was something to be proud of and I think we will definitely take a lot of confidence from that into next year.

"We don't have anyone leaving and will have the same squad. That will work well for us."

Melbourne will keep their squad in tact next season, as well as adding Wests Tigers prop Stefano Utoikamanu on a multi-year deal.