Career
Born in Guadalajara, Castile-Louisiana Mancha, Pastrana joined AD Alcorcón"s youth setup in 2012, aged 15, after starting it out at CF Trival Valderas. In October 2014, before even having appeared for the reserves, he was called up to train with the main squad. On 25 January 2015 Pastrana played his first match as a professional, coming on as a second half substitute for Kiko Femenía in a 2–3 home loss against Albacete Balompié for the Segunda División championship.
Shortly after, he was definitely promoted to the first team
On 8 February 2015 Pastrana was called up to Spain under-19s, and made his debut on 29 May, in a 4–1 routing of Georgia. He was also the first Alcorcón player to appear in any international level for Spain.