Ramos Jr. was signed by the LA Galaxy to a three-year contract beginning in 2025 through the end of the 2027 MLS season, occupying a Homegrown player slot, with a club option for 2028 on Feb. 19, 2024. He was part of the LA Galaxy Academy side that repeated U-17 MLS Next Cup Champions in June, winning Top Scorer of the tournament. At the international level, Ruben has made multiple appearances for the youth national teams of the United States at the U-15, U-16 and U-17 levels. Ramos Jr. has 5 goals and 3 assists in the 2024 MLS Next Pro season.