Róber

Deportivo

Born in Oleiros, Galicia, Pier was a youth product of Deportivo de La Coruña. He made his debut as a senior with their reserves in 2012, spending several years with the side in the Tercera División. Pier made his competitive debut for the first team on 2 December 2015, starting in a 2–1 away win against UE Llagostera in the round of 32 of the Copa del Rey. His first match in La Liga took place on 12 March 2016, when he came on as a second-half substitute for Álex Bergantiños in a 3–0 away loss to Atlético Madrid.

Levante

On 6 July 2016, Pier was loaned to Segunda División club Levante UD for one year. He scored his first professional goal the following 13 May, his team's second in the 2–1 home victory over Girona FC. On 2 August 2017, after achieving top-tier promotion as champions, Pier renewed with Deportivo until 2020 and immediately returned to Levante on a one-year loan deal. The following 7 July, the move was extended for a further season. Pier signed a permanent four-year contract at the Estadi Ciutat de València on 2 September 2019.

Sporting Gijón

On 1 August 2023, free agent Pier agreed to a two-year deal with Sporting de Gijón in the second division. He totalled 75 games during his spell in Asturias, scoring twice.

Later career

The 30-year-old Pier moved abroad for the first time in June 2025, on a contract at Liga MX side Atlas FC. He returned to Spain one year later, joining Cultural y Deportiva Leonesa of Primera…

Levante

Segunda División: 2016–17