On 28 December 2018, Carreras was named in the Jaguares squad for the 2019 Super Rugby season. His playing positions are Fullback, Wing and Fly-half.[citation needed]
Despite sharing the same last name as Mateo Carreras of Newcastle and playing in a common position, the players are not related. Santiago Carreras is from Córdoba; Mateo Carreras is from Tucumán.[citation needed]
International career
Carreras was a starter for the Argentina national team on 14 November 2020 in their first ever win against the All Blacks.[2]