|Full name||Rubén Peña Jiménez|
|Date of birth||18 July 1991|
|Place of birth||Ávila, Spain|
|Height||1.70 m (5 ft 7 in)|
|Playing position||Right back / Winger|
|* Senior club appearances and goals counted for the domestic league only and correct as of 24 August 2018|
Born in Ávila, Castile and León, Peña made his senior debuts with local Real Ávila CF in Tercera División. In the summer of 2012 he signed for Real Valladolid, being initially assigned to the reserves in the same level.
Peña appeared in his first official game with the first team on 1 November 2012, playing the full 90 minutes in a 1–0 home win against Real Betis for the season's Copa del Rey (1–3 aggregate loss). Ten days later he made his La Liga debut, coming on as a late substitute in a 1–1 home draw to Valencia CF.
On 16 June 2016, after being an important figure in Lega's first-ever promotion to the top flight, Peña signed a three-year deal with fellow league club SD Eibar. He finished his first season with 28 appearances and one goal, helping to a tenth-place finish.
During the 2017–18 campaign, Peña was converted into a right back by manager José Luis Mendilibar, becoming a regular starter of that position in the following season after the departure of Ander Capa.
- El Valladolid mantiene su renta pese a estar media hora con diez (Valladolid stay atop in spite of playing half an hour with ten); Diario AS, 1 November 2012 (in Spanish)
- Valencia end away-day blues; ESPN FC, 11 November 2012
- Rubén Peña se suma al nuevo proyecto del CD Guijuelo (Rubén Peña added to the new project of CD Guijuelo); Tribuna de Salamanca, 13 August 2013 (in Spanish)
- Rubén Peña, polivalencia en la banda derecha con pasado en Primera (Rubén Peña, right wing versatility with a past in Primera); CD Leganés, 10 July 2014 (in Spanish)
- Rubén Peña será jugador de SD Eibar hasta 2019 (Rubén Peña will be a SD Eibar player until 2019); SD Eibar, 16 June 2016 (in Spanish)
- Rubén Peña busca mayor protagonismo (Rubén Peña in search of bigger protagonism); Mundo Deportivo, 8 August 2017 (in Spanish)
- "Rubén Peña, ¿el sucesor de Capa?" [Rubén Peña, the successor of Capa?] (in Spanish). Vavel. 6 February 2018. Retrieved 31 August 2018.