[3][4][5] He was moved into the senior squad under manager Leandro Benítez during 2018–19, who selected him for his professional debut in a Copa Argentina tie with Central Córdoba on 24 July 2018.
[1][6] After featuring in the 2018 Copa Libertadores versus Grêmio, Pellegrini made his first appearance in the Primera División on 12 August during a defeat to Godoy Cruz.
[1] On 23 July 2019, Pellegrini agreed a transfer to Major League Soccer's Inter Miami,[8] and he was immediately loaned back to Estudiantes until January 2020.
[13] Estudiantes did not exercise their purchase option at the end of the loan, however, and Inter Miami subsequently waived Pellegrini so that he could join another MLS club on a free outside of the transfer window.
[14] NYCFC announced on October 23, 2023, that the club declined Pellegrini's option, thus making him a free agent.