Zarco began his career in
Platense's ranks. He made his professional bow for the
Primera B Metropolitana club on 10 May 2014 against
Colegiales, coming off the substitutes bench in place of
Jonathan Páez as the fixture ended 2–2. His first start arrived on 25 May versus
Deportivo Armenio, with Platense finishing the
2013–14 campaign fourth; eventually losing in the play-off final to
Temperley. Platense did, however, win promotion four years later in
2017–18, a season Zarco scored his first senior goal during a victory away to
Almirante Brown in September 2017; in what was his twenty-sixth appearance for the club. He departed Quilmes in June 2019. ==Career statistics==