He spent most of his career in the Segunda División, playing 244 matches and scoring ten goals for Eibar, Villarreal B, Celta, Zaragoza, Alcorcón and Levante.

He first appeared officially for the main squad on 5 December 2006, coming on as an early substitute in a UEFA Champions League game at AS Roma (1–0 group stage loss).

In the latter campaign he scored two goals, the first in a 2–2 home draw against FC Barcelona[11] and the second in a 1–0 victory over RCD Espanyol also at Balaídos;[12] that last matchday win ultimately proved essential, as the Galicians eventually avoided relegation.

[13] After a one-year spell abroad at Turkey's Antalyaspor, Insa returned to Spain and its second tier in January 2015, appearing for Real Zaragoza,[14] AD Alcorcón[15] and Levante UD[16] in quick succession.

[20] He did not take the field on either match, only featuring again on 20 January 2024 in the 1–0 loss to Bahrain in the group stage of the 2023 AFC Asian Cup,[21] subsequently facing heavy criticism for his performance.