In a 18-year senior career, in which he amassed La Liga totals of 173 matches and five goals, he played mainly for Athletic Bilbao (seven years, two spells) and Sevilla (four), winning three major titles with the latter club, including two UEFA Cups.

Born in Vitoria-Gasteiz, Álava, Ocio made his debut in La Liga with CA Osasuna during the 2000–01 season, after second division spells with SD Eibar and Albacete Balompié.

He produced similar numbers in the following, adding a rare goal at former club Osasuna albeit in a 2–1 away defeat in which he was also sent off,[7] one of five ejections he totalled in his first two years.

However, after an injury suffered in early October 2009, he missed the rest of the season, with Athletic finishing eighth, adding just five competitive appearances the following year also due to persistent physical problems but renewing his contract on 23 May 2011.

[9] 35-year-old Ocio was deemed surplus to requirements at Athletic in the 2011–12 season after the appointment of manager Marcelo Bielsa, alongside teammates Koikili and Iban Zubiaurre.