Born in Murcia, Marín was a product of Real Murcia's youth system. He made his professional debut on 20 June 2009, appearing in a 1–2 away loss against Córdoba CF in the Segunda División.[1] In January 2010, he signed a three-and-a-half-year professional contract with his hometown club.[2]
In the 2010–11 season, Marín contributed with 11 games as Murcia returned to the second level after one year, as champions. He continued to be sparingly played in the following two campaigns.