Lanús De la Vega started his career in the youth of Ferrocarril Sud before joining
Lanús in 2015, having previously been rejected in trials with
Boca Juniors and
River Plate. Having been moved into the
Argentine Primera División club's first-team squad for
2018–19, De la Vega was selected for his professional debut on 16 September 2018 during a home loss to
Racing Club. He made two further appearances in September against
Newell's Old Boys and River Plate respectively. He scored his first goal in the
2019 Copa de la Superliga, netting in a round of sixteen defeat to
Vélez Sarsfield. with Lanús retaining a 20% stake in any future sales. He signed a contract with the Sounders through the 2027 MLS season, with a club option for 2028. De la Vega had been scouted by the team six years prior and began negotiations in 2023. He made his MLS debut in the season opener on 24 February against
Los Angeles FC and scored a penalty kick in the 2–1 loss. Pedro de la Vega left early in the second half of the team's home match on 2 March with a right hamstring injury. The Sounders later announced the injury would prevent him from playing for six to eight weeks. On 31 July, de la Vega scored two goals in a 7–0 defeat of
Cruz Azul in the
2025 Leagues Cup. His second goal was later nominated for the
FIFA Puskás Award. ==International career==