He currently plays for CA Osasuna Promesas, wearing the number 4 shirt. He plays primarily as a Defender. He stands at 188cm tall and weighs 76kg. His current market value is estimated at 200K €.

His most recent move was a from Atletico de Madrid B to CA Osasuna Promesas on 2024-08-15.

Throughout the Primera Federación 2025-2026, Diego Espejo featured in 17 matches, averaging 0 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.