Guillermo "Guille" Vallejo Delgado (born 22 April 1995) is a Spanish professional footballer who plays as a goalkeeper for AD Ceuta FC.
He made his senior debut with the reserves on 30 August 2014, starting in a 1–1 Tercera División home draw against Real Ávila CF.
On 9 August 2016, after two seasons as a starter, Vallejo signed for Segunda División B side Cultural y Deportiva Leonesa, mainly as a cover for injured Jorge Palatsí.
[1] He was a first-choice during most of the campaign, only losing his starting spot after Palatsí recovered, as Cultu achieved promotion to Segunda División after a 42-year absence.
On 16 November 2018, after more than four months without a club, he moved to UD San Sebastián de los Reyes in the same category,[3] but featured just once before joining fellow league team Real Valladolid Promesas the following 16 January.