|Full name||Óscar Arribas Pasero|
|Date of birth||22 October 1998|
|Place of birth||Parla, Spain|
|Height||1.83 m (6 ft 0 in)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 10 October 2020|
Arribas was born in Parla, Community of Madrid, and joined AD Alcorcón's youth setup in 2014, from CDE Lugo Fuenlabrada. He made his first team debut on 29 November 2016, before even appearing with the reserves, coming on as a second half substitute for Samu in a 1–1 home draw against RCD Espanyol for the season's Copa del Rey.
Arribas made his debut with the B-side on 15 January 2017, in a 0–3 Tercera División home loss against Getafe CF B. His Segunda División debut came on 4 March, again from the bench in a 0–0 home draw against Sevilla Atlético.
On 16 August 2019, Arribas signed his first professional contract until 2021. He scored his first goal with the main squad on 12 October, netting the opener in a 3–1 away defeat of Sporting de Gijón.
- "Arribas ya es futbolista profesional" [Arribas already is a professional footballer] (in Spanish). Hat Trick Soccer. 16 August 2019. Retrieved 9 August 2020.
- "Reyes evita un problema" [Reyes avoids trouble] (in Spanish). Marca. 29 November 2016. Retrieved 1 December 2016.
- "La falta de acierto condena a Alcorcón y Sevilla Atlético" [The lack of aim condemn Alcorcón and Sevilla Atlético] (in Spanish). Marca. 4 March 2017. Retrieved 5 March 2017.
- "Óscar Arribas firma su contrato profesional con la A.D. Alcorcón" [Óscar Arribas signs his professional contract with A.D. Alcorcón] (in Spanish). AD Alcorcón. 16 August 2019. Retrieved 19 August 2019.
- "El Alcorcón luce su pegada y deja moribundo al Sporting" [Alcorcón show their power and leave Sporting dying] (in Spanish). Marca. 12 October 2019. Retrieved 12 October 2019.