Complex sentence: Muñoz played for various junior teams in the Madrid area, but initially failed to attract the attention of Real Madrid, going on to subsequently represent CD Logroñés, Racing de Santander and Celta de Vigo.
Split into simpler sentences: Muñoz played for various junior teams in the Madrid area, but initially failed to attract the attention of Real. He subsequently played for CD Logroñés, Racing de Santander and Celta de Vigo.