In 2011, Mata'utia graduated to the Knights' New South Wales Cup team, Central Coast Centurions. In Round 11 of the 2011 NRL season, he made his NRL debut for the Knights against the Sydney Roosters,[15] scoring a try on debut.[16] On 17 June, he re-signed with the Knights on a 2-year contract, turning down offers from three rival teams.[17] He finished his debut season having played in five games and scoring two tries.[18]
2012
In July, Mata'utia was admitted to hospital after suffering a crushed larynx in a New South Wales Cup game for the Knights. He received an emergency tracheostomy after he was unable to breathe during a scan on his neck. He was ruled out for the rest of the season,[19] after only playing one NRL game for the Knights that year.[20]
On 3 May, Mata'utia returned to the Samoan side against Fiji in the 2014 Pacific Rugby League International.[26] In Round 10 of the 2014 NRL season, he made his club debut for the Dragons against the Parramatta Eels.[27] On 8 September, he was named in the Samoan train-on squad for the 2014 Four Nations,[28] later making the final 24-man squad for Samoa,[29][30] however he was unable to compete in the tournament due to passport issues.[31]
2015
On 3 May, Mata'utia again played for the New South Wales Residents against the Queensland Residents, this time alongside his brother Chanel.[32] On 24 June, he re-signed with the Dragons on a 2-year contract.[33]
2016
On 20 April, Mata'utia returned to the Newcastle Knights effective immediately on a contract until the end of 2017, after being released from his Dragons contract.[34][35]
2017
Mata'utia played in every match for the Knights in the 2017 season, only missing 6 games since returning to the Knights midway through the 2016 season. In October, he rejected a 1-year extension offer from the Knights and instead signed a 3-year contract with the Leigh Centurions in the English Kingstone Press Championship.[36]
2018
Mata'utia started the 2018 season with the Leigh Centurions, however, was allowed to leave the club due to the club's inability to make the top 4 of the Championship and owner Derek Beaumont admitting that he would not be able to financially support the club beyond the current season.[37] Mata'utia signed a loan deal with Castleford Tigers until the end of 2018, which would lead to a 3-year deal from 2019 until the end of 2021.[38] He made his debut in the Tigers' 52–24 victory over Widnes Vikings.[39]
2019
Mata'utia was assigned the number 1 jersey.[40] In January 2019 he revealed tha this five-year-old son had suffered a cancer scare.[41]
He played 26 games for Warrington in the 2023 Super League season as Warrington finished sixth on the table and qualified for the playoffs. He played in the clubs elimination playoff loss against St Helens.[43]
On 7 October 2023, he announced his retirement from professional rugby league.[44]