Complex sentence: De la Fuente was definitely promoted to the main squad in the 1982 summer, and scored his first professional goal on 26 March of the following year, netting the last in a 4--0 home routing of Celta de Vigo.
Split into simpler sentences: De la Fuente was definitely promoted to the main squad in the 1982 summer. He scored his first professional goal on 26 March of the following year, netting the last in a 4--0 home routing of Celta de Vigo.