Matías Gallardo

career
Gallardo joined the academy of River Plate in 2014, when his father was appointed manager of the club. Having progressed through the academy, he made his debut for the club on 25 March 2023 in a 4–3 friendly win against Chilean team Universidad de Chile, almost exactly thirty years after his father had made his debut for the club.

Atlanta United
In July 2023, Gallardo left River Plate, joining American club Atlanta United on a free transfer and being assigned to the club's reserve team. He made his MLS Next Pro debut the following month, coming on as a late substitute for Karim Tmimi in a 5–1 away loss to the New England Revolution II. Despite this, his start in the United States was seen as slow, and after a year in the country, he had not featured regularly.

As his form picked up, he accumulated more minutes, and in June 2024 he signed a Short-Term Agreement with Atlanta United's first team, ahead of their Major League Soccer match against D.C. United. An unused substitute against D.C. United, he would appear once more on the bench, in an 1–1 draw against St. Louis City, before being released by the club in October 2024.

Instituto
Gallardo returned to Argentina after his release, signing with Instituto on 2 January 2025. His first involvement with the first team came against his father's team, and Gallardo's former club, River Plate, though he remained on the bench for his new club's 1–0 defeat on 30 January. His debut would come in March of the same year, as a second-half substitute for Francis Mac Allister in a 2–0 loss to Argentinos Juniors.