After being in the
Boca Juniors youth team, Mateos joined
Tigre playing for the
reserve team. Later, he played for the
Primera B Metropolitana sides
Colegiales and
San Telmo. In 2018, he joined
Primera B de Chile side
Ñublense, getting the promotion to
Chilean Primera División for the
2021 season after becoming the
2020 Primera B de Chile champion. In 2023, Mateos joined
Universidad de Chile. In 2025, he returned to Ñublense on a loan for the season. Back to Universidad de Chile in 2026, he ended his contract and switched to
Audax Italiano. ==Honours==