Etxeita scored his first competitive goal for Athletic on 25 October 2014, the only in a league fixture at UD Almería. His second came on 4 March of the following year, as he helped to a 2–0 defeat of RCD Espanyol in Barcelona to make his team reach the final of the Copa del Rey for the first time in three years; he played the entire decisive match, a 3–1 loss to FC Barcelona, and also started both legs of the subsequent edition of the Supercopa de España against the same opponent, which was won 5–1 on aggregate and brought a first trophy for the player.