Diego Caballo Alonso (born 17 February 1994) is a Spanish professional footballer who plays for Intercity as a left-back.

[2] He scored his first senior goal with the C's on 19 October, netting the opener in a 2–0 Tercera División home defeat of CD Móstoles URJC.

[7] On 2 September of the following year, he terminated his contract with Dépor,[8] and signed a one-year deal with fellow second division side Extremadura UD the following day.

On 5 July 2023, Caballo signed for newly relegated Danish 1st Division side AaB for an undisclosed fee from Sydney FC.

[13][14] After a half-season that saw just 80 minutes of playing time in the league over five games, AaB confirmed on January 6, 2025 that the parties had agreed to terminate the contract with immediate effect.