He currently plays for Widzew lodz, wearing the number 40 shirt. He plays primarily as a Defender. His preferred foot is Left. His current market value is estimated at 900K .

His most recent move was a Free from Racing Santander to Widzew lodz on 2026-07-10. The reported fee was 0.5M €.

Throughout the Copa del Rey 2025-2026, Mario García Alvear featured in 4 matches, averaging 2.8 tackles, 1.5 interceptions, and 4.8 clearances per game, while blocking 0 shots per game.