On 13 July 2014 Jesús signed a three-year professional deal, being definitely promoted to the main squad.[1] He made his first-team debut on 11 September, starting in a 2–0 away win against RCD Mallorca, in the season's Copa del Rey.[2]
Valentín made his league debut on 1 March 2015, starting in a 1–1 home draw against CD Tenerife in the Segunda División.[3] On 25 August he was loaned to fellow league team SD Huesca, in a season-long deal.[4]
Valentín scored his first professional goal on 13 March 2016, netting the game's only in a home success against AD Alcorcón. On 7 July, he rescinded his contract with Las Palmas[5] and signed a permanent three-year deal with Huesca four days later.[6]
On 3 January 2017, Valentín was transferred to fellow league team Real Zaragoza.[7] On 31 January of the following year, he signed for Córdoba CF in the same division.[8]