[3] Luai's paternal grandparents were from Palauli, Samoa[4] He played his junior rugby league for the St Marys Saints before being signed by the Penrith Panthers.

[12] In round 17, Luai started at halfback in his second NRL match in the absence of Nathan Cleary and James Maloney due to State of Origin.

[13][14][15] Luai made 13 appearances for Penrith in the 2019 NRL season as the club finished 10th on the table and missed the finals for the first time in four years.

[17] Luai's form throughout the season was rewarded with a spot in the New South Wales State of Origin 27 man squad although he did not play in the three game series.

However, Luai was ruled out of game three of the series after he suffered a knee injury in Penrith's round 16 win over the Parramatta Eels.

[21] Luai played a total of 25 games for Penrith in the 2021 NRL season including the club's grand final victory over South Sydney.

Following the grand final victory, Luai once again mocked the Parramatta club through social media posing for a photo with the caption "Daddy loves you".

[34] Luai played every match of the 2021 Rugby League World Cup including the final against Australia in which Samoa were comprehensively beaten 30-10.

[36] On 18 February, Luai played in Penrith's 13-12 upset loss to St Helens RFC in the 2023 World Club Challenge.

[37] On 22 May, Luai was selected by New South Wales for game one of the 2023 State of Origin series[38] which was ultimately lost to the Queensland side.

[41] In round 26, Luai was taken from the field early in the first half after suffering a suspected dislocated shoulder during Penrith's 32-18 shock loss to Parramatta.