Born in
Pamplona,
Navarre, Ros played his youth football with
Real Sociedad. Being signed at the age of only 12, he travelled regularly by
taxi from
Tudela to the club's training facilities, until eventually moving to a school in
San Sebastián. He made his senior debut in the
2008–09 season, appearing for
the reserves in the
Segunda División B and suffering relegation. Ros made his first appearance for the first team on 23 May 2009, coming on as a
substitute for another youth graduate,
Markel Bergara, in the early stages of a 1–0 away win against
UD Salamanca. As the
Basques had no chance to promote from
Segunda División from that moment onwards, he started in the last four games of
the campaign, renewing his contract until 2014 at its closure. In late January 2010, Ros was loaned to neighbouring
SD Eibar in the third tier. Subsequently, he returned to Real Sociedad, going on to be a very important midfield unit for the B's over two full seasons, still in division three. On 19 August 2012, Ros made his first appearance in
La Liga, playing 12 minutes in a 5–1 loss at
FC Barcelona. He finished his
first season with the main squad with just seven competitive appearances, totalling 161 minutes of action. Ros scored his first goal for Real Sociedad on 18 December 2013, opening the 4–0 home win over
Algeciras CF in the
round of 32 of the
Copa del Rey (5–1 on aggregate). His second came on 16 January of the following year in the same competition, the only in the tie against
Villarreal CF to qualify his team for the quarter-finals. On 19 July 2014, Ros joined second-division club
RCD Mallorca on a
free transfer, signing a two-year contract. In January 2016, again as a
free agent, he moved to
Real Zaragoza of the same league. A regular starter in his first seasons, Ros lost his starting spot midway through
2019–20, and suffered a
knee injury which kept him out for six months in December 2020. On 30 January 2022, he was loaned to
SD Amorebieta also of the second tier for six months. Ros announced his retirement in May 2024, aged 34. ==Personal life==