Complex sentence: Mendilibar enjoyed an average career as a player, never representing a club in La Liga; successively, he played for Bilbao Athletic, CD Logroñés, Sestao Sport Club and SD Lemona.
Split into simpler sentences: Mendilibar enjoyed an average career as a player, never representing a club in La Liga. Successively, he played for Bilbao Athletic, CD Logroñés, Sestao Sport Club and SD Lemona.