Hailing from the Basque Country in northern Spain, Odei Onaindia began his youth career with hometown side Lekeitio FT. From there he moved to Athletic Bilbao’s academy, before CD Basconia became his first senior club in 2008. This was followed by stints at various other Spanish lower division clubs, before he returned to Bilbao to join their Reserves Team.

In 2018, Onaindia joined CD Mirandes, and was one of the key names in the squad that achieved promotion to the Segunda Division the following year. 2020 marked a turning point in his career when he shifted abroad for the first time to join Hyderabad FC.

The 33-year-old has played 41 matches to-date in the ISL, clocking 3715 minutes and maintaining a passing accuracy of 80.96%. He has also registered 1.80 tackles, 1.32 interceptions, 4.24 clearances and 1.63 blocks per game during this period.

His performances stood out especially in the 2022-23 season, when his then-team Hyderabad FC conceded just 16 goals in 22 matches, the best defensive record among all the teams that year.