He currently plays for Deportivo Saprissa, wearing the number 13 shirt. He plays primarily as a Goalkeeper.

His most recent move was a from Deportivo Saprissa II to Deportivo Saprissa on 2025-01-01.

In the Costa Rica Primera Division 2025-2026, Isaac Alfaro played 23 matches, averaging 0 interceptions, 0 tackles, and 0 clearances per game.