Marcos Alonso is a 35-year-old professional football player from ESP. He currently plays for RC Celta de Vigo, wearing the number 3 shirt. He plays primarily as a Defender. He stands at 188cm tall and weighs 84kg. His preferred foot is Left. His current market value is estimated at 1.2M .

His most recent move was a from RC Celta to Free player on 2026-07-01.

Throughout the La Liga 2025-2026, Marcos Alonso featured in 22 matches, averaging 1.2 tackles, 1 interceptions, and 5.3 clearances per game, while blocking 0.4 shots per game.