Marshall Alfaro is a 17-year-old professional football player from CRC. He currently plays for CS Herediano, wearing the number 45 shirt. He plays primarily as a Goalkeeper.

His most recent move was a from Santa Cruz PFA to CS Herediano Youth on 2024-12-31.

In the FIFA U17 World Cup 2025, Marshall Alfaro played 3 matches, averaging 0 interceptions, 0 tackles, and 0 clearances per game.