Born in San Sebastián, Gipuzkoa, Basque Country, Sarriegi represented Antiguoko and Real Sociedad as a youth.
He was promoted to the latter's reserves on 23 June 2014,[1] but opted to join RCD Mallorca B shortly after, being immediately loaned to Peña Sport FC.
[3] He made his debut for the first team – SD Eibar – on 12 January 2017, starting in a 0–0 home draw against CA Osasuna for the Copa del Rey.
[5] On 9 July 2018, Sarriegi moved abroad for the first time in his career, joining Bahraini Premier League side East Riffa Club.
[9] A forward or right back, he too began at Antiguoko before being signed by Athletic Bilbao in 2015,[10] serving loans and moving on to Deportivo Alavés two years later.