[1] Osores started his career with Lastenia in 2015, playing nine times in Torneo Federal B.
[4][5] Osores first appeared in the club's first-team in 2017, making the substitutes bench for a Copa Sudamericana first leg with Oriente Petrolero in Bolivia on 11 July.
[1][6] He made his professional debut in the second leg, playing the full match in a 3–0 win at the Estadio Monumental José Fierro.
[1] On 11 November, Osores made his second appearance in a Copa Argentina victory versus Rosario Central.
[7] His debut came in August against Barracas Central, with the defender scoring on his next appearance on 4 October versus Estudiantes.