The former-Liverpool youth team player returned to Bilbao in 2010, and he's currently enjoying his best goalscoring season as a professional.
Athletic have struggled this term, and have relied heavily on the goals of Aritz Aduriz.
As a result, San Jose is the club's joint-second top scorer with five - more than Oscar De Marcos, Susaeta and Iker Muniain. And four more than the out-of-favour Fernando Llorente. Not bad for a centre-back.