Born in Sestao, Biscay, Etura spent 13 seasons in La Liga with Athletic Bilbao, after signing in the 1953 summer from neighbouring CD Getxo. He only played 16 games in his first three years combined, his debut coming on 12 December 1954 in a 3–0 home win against Hércules CF.
During his stint at the San Mamés Stadium, Etura appeared in 248 matches across all competitions, scoring three goals. His first in the league came on 27 September 1959, but in a 2–3 away loss to Granada CF.
Etura won four titles with his main club, included the 1955–56 national championship to which he contributed with nine appearances. He retired in 1967 at the age of 34, after a spell in Segunda División with SD Indautxu.