He played youth football with local club SD Eibar, making his senior debut in the 2009–10 season with the reserves in the Tercera División.
[2] Arregi made his Segunda División debut on 31 August 2013, starting in a 1–1 away draw against UD Las Palmas.
[3] On 1 August of the following year, after featuring rarely as his side achieved another promotion, he was loaned to Cádiz CF in the third division.
[4] Arregi terminated his contract at the Ipurua Municipal Stadium on 2 July 2015,[5] and subsequently signed for La Roda CF in the third tier.
[8][9] On 27 January 2022, Arregi severed his ties to Amorebieta,[10] and joined Primera División RFEF's UD Logroñés the following day.