On 8 August 2018, Athletic Bilbao announced on their website that Arrizabalaga had paid his required release clause (€80 million / £71.6 million), making him the world's most expensive goalkeeper only weeks after the record was set by Alisson's transfer to Liverpool.
La 8 august 2018, Athletic Bilbao a anunțat pe site-ul lor că Arrizabalaga și-a achitat clauza de eliberare obligatorie (80 de milioane de euro/71,6 lire), făcându-l cel mai scump portar din lume la doar câteva săptămâni după ce recordul fusese stabilit de Alisson la Liverpool.