Triantis was born in Sydney,[4]New South Wales to Poppy Triantis, with seven brothers and three sisters,[5] and is of Greek descent.[2] His father, Con Triantis, passed away from a fire in Eastwood when he was eight.[6][7] He has three older brothers, Chris and Peter, both of whom were professional soccer players in the A-League.[8] Triantis began his soccer career at Sydney Olympic, initially as a winger and attacking midfielder, in their junior age groups.[6]
Club career
Western Sydney Wanderers
In July 2021, Western Sydney Wanderers signed Triantis to a scholarship contract.[9] Triantis made one A-League Men appearance for the Wanderers, coming on as a late substitute in a loss to Newcastle Jets in February 2022.[10] On 1 July 2022, the Wanderers confirmed that Triantis was one of four players departing the club following the 2021–22 season.[11]
On 21 June 2023, Triantis signed for English club Sunderland on a four-year contract for an initial fee of around £300,000.[14][15][16]
After playing in three first-team games for Sunderland during the 2023–24 season, Triantis was loaned to Scottish Premiership club Hibernian on 1 February 2024.[17]
