Gallegos made his Open debut at Royal St George's in 2021 after becoming one of two 17-year-olds to qualify on the same day.
South Korean Joohyung Kim earned his spot with a fourth-place finish at the SMBC Singapore Open, then Gallegos captured the Latin America Amateur Championship, which offered an Open Championship spot for the first time in addition to an invitation to The Masters.
Gallegos was two behind Colombian Jose Vega with a round to play, but produced a four under par 67 to triumph by four and earn his spot at Royal St George's, where he missed the cut on +9.
He hails from the small town of Veinticinco De Mayo, about two hours south-west of Buenos Aires, and learned the game on a modest nine-hole course named Las Mulitas (“Little Mules”).