Mikel Santamaría

Born in Pamplona, Navarre, Santamaría finished his development at CA Osasuna, and made his senior debut with the reserves in the Segunda División B. In 2008, he signed with CD Alfaro of the same league. Santamaría joined Athletic Bilbao in the summer of 2009, being assigned to the B team also in the third division. He subsequently represented, still in that tier, Albacete Balompié and CD Leganés, being promoted to Segunda División with the latter club at the end of the 2013–14 season. On 24 August 2014, Santamaría played his first match as a professional, starting in a 1–1 home draw against Deportivo Alavés. On 21 July of the following year, he moved to Racing de Santander, recently relegated from division two.

Santamaría's older brother, Roberto, was also a footballer. A goalkeeper, he too was developed at Osasuna. In 2022, both siblings signed for CD Tudelano and played together for the first time.