Last season saw a stack of youngsters emerge from the shadows, some going further than others. But with the regular season just weeks away, the question remains, which ones can back it up in 2017?

Nathan Cleary

Cleary only stepped in halfway through the regular season, but showed just how cool, calm and collected the head on his shoulders was in the months that followed. His ball-playing skills, as well as his kicking game, is phenomenal for a teenager. Playing behind a superstar forward pack like Penrithโ€™s is a big help for any halfback. With a proper five-eighth alongside him in 2017, Cleary is set for another big year.

Second Year Syndrome: Not likely

GOLD COAST, AUSTRALIA - AUGUST 01: Ashley Taylor of the Titans runs at the Sharks defence during the round 21 NRL match between the Gold Coast Titans and the Cronulla Sharks at Cbus Super Stadium on August 1, 2016 in Gold Coast, Australia. (Photo by Jason O'Brien/Getty Images)

Ashley Taylor

Yes, yes, Taylor debuted in 2015 technically. BUT last year was the young halfโ€™s first full NRL season, and didnโ€™t he deliver. Playing in a team heavily tipped for last yearโ€™s wooden spoon, Taylor lifted the side not only from the bottom but into their first finals series in six years, nabbing the Dally M Rookie of the Year along the way. Jarryd Hayne has a full pre-season under his belt, Kane Elgey is back and expect Taylor to fire again. After starring for the Indigenous All-Stars last week, thereโ€™s no wonder Brisbane want him back.

Second Year Syndrome: Nope

MELBOURNE, AUSTRALIA - SEPTEMBER 10: Suliasi Vunivalu of the Storm runs away to score his teams first try during the NRL Qualifying Final match between the Melbourne Storm and the North Queensland Cowboys at AAMI Park on September 10, 2016 in Melbourne, Australia. (Photo by Scott Barbour/Getty Images)

Suliasi Vunivalu

The latest Fijian flyer to take the NRL by storm, scoring 23 tries in 21 games in his debut season. Playing outside of rep stars Will Chambers, Kevin Proctor and Cooper Cronk, some tries are easier than most. Blessed with strength and speed, Vunivalu could easily match those numbers again this season, but with speedster Josh Addo-Carr set to start on the left wing and Proctor having departed for the Gold Coast, expect a lower tally from Vunivalu in 2017.

Second Year Syndrome: Possible

SYDNEY, AUSTRALIA - JUNE 30: Latrell Mitchell of the Roosters dives to score a try during the round 17 NRL match between the Sydney Roosters and the Canterbury Bulldogs at Allianz Stadium on June 30, 2016 in Sydney, Australia. (Photo by Mark Nolan/Getty Images)

Latrell Mitchell

Playing in every single game for the Roosters in 2016, the Taree product impressed, playing the majority of the season at the back for the tricolours. Mitchell appeared shaky at times, with the high ball a real problem for the youngster. The inclusion of Michael Gordon is set to see Mitchell move to the centres this season, a real learning curve for the teenage prodigy. The centres will see Latrell handle the ball less, allowing him to focus on his individual game opposed to organising the whole backline.

Second Year Syndrome: Unlikely

SYDNEY, AUSTRALIA - AUGUST 29: Bevan French of the Eels celebrates one of his tries during the round 25 NRL match between the Parramatta Eels and the St George Illawarra Dragons at Pirtek Stadium on August 29, 2016 in Sydney, Australia. (Photo by Mark Nolan/Getty Images)

Bevan French

Scoring 19 tries in 13 matches isnโ€™t an easy feat, but French isnโ€™t your average rookie. French lit up the Auckland Nines last year, announcing himself to the rugby league world and stealing the spotlight from teammate Semi Radradra. French will start the season as the Eelโ€™s custodian but as we learnt with Latrell Mitchell, spending a full season at fullback isnโ€™t easy for a youngster. The amount of organising and consistency required for a modern day fullback is incredible, making it one of the most important positions of today. French is too good a player to flop, but heโ€™ll struggle at times at the back.

Second Year Syndrome: Likely

NEWCASTLE, AUSTRALIA - JUNE 11: Daniel Saifiti of the Knights is tackled by the Warriors defence during the round 14 NRL match between the Newcastle Knights and the New Zealand Warriors at Hunter Stadium on June 11, 2016 in Newcastle, Australia. (Photo by Ashley Feder/Getty Images)

Jacob & Daniel Saifiti

Novocastrian twins the Saifiti brothers line up for their second NRL season, with a large portion of the Knightโ€™s future pinned on the duo. Both impressed in a struggling forward pack last year, with Daniel particularly impressive up front, averaging over 100 metres a game. The inclusion of experienced forwardsย  Jamie Buhrer, Anthony Tupou and Josh Starling takes a load off the twins, giving them a lot more room to grow in 2017.

Second Year Syndrome: Doubtful

Te Maire Martin of the Panthers runs with the ball during the round seven NRL match between the Sydney Roosters and the Penrith Panthers at Allianz Stadium on April 18, 2016 in Sydney, Australia.

Te Maire Martin

Despite a shoulder injury ending his season after just six games, Te Maire Martin ended his debut season as a Kiwi international and has high expectations ahead of this year. Playing all six of his games with Penrith alongside Jamie Soward, Martin will partner young gun Nathan Cleary in a strong yet youthful Pantherโ€™s team. The addition of James Tamou will add more go-forward to the pack, with Martinโ€™s running game to benefit. If Martin and Cleary click, thereโ€™s little stopping Penrith on a charge to the Grand Final, thatโ€™s if they click.

Second Year Syndrome: Could go either way

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