He is on the books of Racing Santander and wears shirt number 3. His main role on the pitch is Defender. His stronger foot is Left. His estimated market valuation currently stands at 900K €.

His latest transfer saw him join Racing Santander from Rayo Cantabria via on 2023-12-31.

Across the Copa del Rey 2025-2026, Mario García Alvear appeared in 4 matches and averaged 2.8 tackles, 1.5 interceptions, 4.8 clearances, and 0 blocked shots per game.