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. Eizaguirre retired at the age of nearly 40 after four seasons with
CA Osasuna, still in the main category – before the last one,
1959–60, ended, he was named the club's
player-coach, as the campaign ended in relegation for the
Navarrese. He worked as a manager until the late 70s, with
Córdoba CF,
Sevilla FC and
Granada CF in the top division and a host of teams in the second level. ==International career==