He is on the books of Real Aviles and wears shirt number 9. His main role on the pitch is Forward. His stronger foot is Right. His estimated market valuation currently stands at 250K €.

His latest transfer saw him join Real Aviles from Rayo Cantabria via on 2024-07-17.

During the Primera Federación 2025-2026 campaign, Álvaro Santamaría made 23 appearances, scoring 4 goals and adding 0 assists. He averaged 0.2 goals per match from 0 shots, with 0 on target.