Óscar Sielva Moreno (born 6 August 1991) is a Spanish professional footballer who plays as a central midfielder for SD Huesca.

[4] He appeared in only one sixth of the league games during the campaign, often clashing with manager Juan Ignacio Martínez who wanted to play him out of position as a winger;[5] he returned to Espanyol in January 2010.

[10] He continued to compete in divisions three and four in the following years, representing Marbella FC,[11] CE Europa,[12] UD Somozas, Rápido de Bouzas and SD Ponferradina.

[15] On 21 June 2021, after scoring a career-best ten times, Sielva moved to fellow second-division side SD Eibar on a three-year contract.

[18] Sielva was a regular for the Spain under-17 side, playing a vital role in its triumph during the 2008 UEFA European Championship held in Turkey.