He joined the youth setup at
Major League Soccer club
San Jose Earthquakes in 2015. With the Earthquakes, Luna participated in various tournaments, including the
Dallas Cup and
Generation Adidas Cup.
El Paso Locomotive On April 5, 2021, Luna signed a professional contract with
USL Championship club
El Paso Locomotive. Following the match, as well as the second against
Rio Grande Valley Toros, Locomotive head coach
Mark Lowry said, "He has the mentality to go to the very top and we’re gonna help him do that." Luna scored his first professional goal for El Paso on June 3, the winning goal in a 1–0 road victory over
Austin Bold. He headed in a crossed ball from
Macauley King in the 56th minute to give his side all three points. After declining to join as an alternate for the US Olympic team that was set to participate in the
2024 Summer Olympics in
Paris, Luna confirmed on July 23, 2024, that he had not ruled out filing a one-time switch to
FIFA switching his allegiance with Mexico's
Mexican Football Federation. On January 6, 2025, Luna was called up by
Mauricio Pochettino for training camp and friendlies against
Venezuela and
Costa Rica. During the first half of the match against Costa Rica, Luna was elbowed in the face by a Costa Rican player and had his nose broken, but despite this Luna returned to the field to play through until halftime after having cotton shoved up his nostrils and changing to a fresh jersey after the previous had been bloodied. Luna provided an assist to
Brian White's opening goal before going to the hospital for treatment after halftime, and in an interview following the end of the match which the United States won 3–0, Pochettino praised Luna's character and said that he had "big balls". On June 5, Luna was selected by Pochettino to represent the United States in the
2025 CONCACAF Gold Cup, He scored his first international goal for the senior team on June 29 when he scored the first goal of a 2–2 draw against Costa Rica in the
quarter-finals, helping the United States to the penalty shoot-out which they won 4–3. On July 2, USMNT defeated Guatemala 2–1, with Luna scoring in the 4th and 15th minutes to mark his first international brace. The USMNT would go on to lose 2–1 in the final against
Mexico. ==Career statistics==