Answer
Begiristain made 202 appearances for Real Sociedad, a Spanish football club based in San Sebastián. He played for the club from 1982 to 1988, making him one of the most capped players in the club's history. During his time at Real Sociedad, Begiristain helped the club win the Copa del Rey in 1987 and the Supercopa de España in 1982.