He played 381 La Liga games during 19 seasons, representing Real Sociedad, Valencia and Osasuna.
Born in San Sebastián, Gipuzkoa, Eizaguirre signed with Real Sociedad in 1936, but no football was played in the country from that year and 1939 due to the Spanish Civil War.
He made his debuts with the club in Segunda División and, after one season, reached La Liga as he moved to Valencia CF.
With the Che, Eizaguirre – who did not lineup in his first year due to suspension – won his three national championships in his first six seasons, conquering two Ricardo Zamora Trophy awards in the process.
After one full decade he returned to his native Basque Country and Real Sociedad, for a further six top flight campaigns.