Tai Anthony Tuivasa (born 16 March 1993) is an Australian professional mixed martial artist.

[8] Tuivasa was born in Sydney to an Indigenous Australian (Wiradjuri) mother and a Samoan father.

[9] He grew up in the western Sydney suburb of Mount Druitt with 11 siblings,[10][11] and predominantly played rugby league in his youth.

He was signed by the professional Sydney Roosters rugby league club in 2010, but gave up playing the sport when he developed a gambling addiction.

[13] Tuivasa also fought a couple of MMA mixed rules bouts with Combat 8 promotions.

[15][16] In November 2016, it was announced that Tuivasa had signed a four-fight contract with the Ultimate Fighting Championship.

According to Tuivasa, he had to sit out for an extended period due to a knee injury and subsequent surgery.

[22] On 13 February 2018 Tuivasa entered the UFC's official rankings for heavyweight fighters, coming in at position 15.

[33] However, on 9 April, Dana White, the president of UFC, announced that this event was postponed to a future date.

[37] However, Mayes was removed from the fight during the week leading up to the event for undisclosed reasons and was replaced by promotional newcomer Harry Hunsucker.

[63] Judge Howie Booth, who scored the fight 30-27 for Tuivasa, was relieved of his duties midway through the event, and received widespread criticism from pundits, fighters and fans for his scorecard;[64][65][66][67] 15 out of 15 media outlets scored the bout 30-27 for Rozenstruik.

[75][76][77] Tuivasa currently hosts "The Halfcast Podcast", with Tyson Pedro and Andrew Fifita as co-hosts.

[citation needed][84] Tuivasa is co-owner of Drink West Brewery with Tyson Pedro and Nathan Cleary.