Olsen started his playing career in the local leagues of Parana, Entre Ríos. In 1949 he was signed by Tigre, the following year he joined champions Racing Club de Avellaneda. After playing 15 games for Racing Club, he joined Real Madrid where he went on to become one of the club's most important goal scorers.[1] He played out his career with Córdoba CF in the late 1950s.