Complex sentence: Cavaco spent his first five years as a senior in the lower leagues of his country (he belonged to C.F. Estrela da Amadora for a brief period of time, never appearing officially for the club), representing three different teams.
Split into simpler sentences: Cavaco spent his first five years as a senior in the lower leagues of his country. He belonged to C.F. Estrela da Amadora for a brief period of time, never appearing officially for the club and representing three different teams.