Oier commonly refers to Oier Sanjurjo Maté (known simply as Oier), a Spanish professional footballer born 9 October 1986 in Estella-Lizarra, Navarre, Spain. He is best known for his long association with Club Atlético Osasuna.

• Full name: Oier Sanjurjo Maté
• Date of birth: 9 October 1986
• Place of birth: Estella-Lizarra, Navarre, Spain
• Position: Primarily a defender (right back / centre back) and also deployed as a defensive midfielder on occasion
• Youth clubs: CA Osasuna youth system
• Senior career (highlights):
  • Osasuna B (2004–2008)
  • CA Osasuna (2008–2015; 2016–2022) — long-serving first-team player and captain in later years
  • Loan to CD Numancia (2010–2011)
  • CD Mallorca (2015–2016)
• Notable facts:
  • Made his Osasuna first-team breakthrough in the late 2000s and became a regular in La Liga for several seasons.
  • Versatile defensive player capable of covering multiple positions across the backline and midfield.
  • Served as one of Osasuna’s leaders and captains, particularly during his second spell at the club.

If you want statistics (appearances, goals) for a particular season or his current status after 2024, I can fetch updated numbers. This summary covers his career up through his well-known period with Osasuna.