Hoppe is the fifth American to come through the Schalke 04 youth system in recent years. McKennie, now at Juventus, made his first-team debut in 2017, Wright, now one of the top scorers in Denmark's Superliga, played his first game in 2018. Nick Taitague is still at Schalke 04, playing for its second team. Zyen Jones, now at Hungary's Ferencvaros' second team, left Schalke 04 after playing part of one season with its U-19s.
Hoppe hails from Southern California, where he played for Strikers FC before moving to the Barca Academy in Arizona, where he was the top scorer in the 2018-19 Development Academy's U-18/19 age group with 29 goals in 20 games.
In 2017-18, Hoppe was named to the Development Academy's West Conference Best XI for U-16/17 players that also included Ulysses Llanez, Efrain Alvarez, Leonardo Sepulveda and Kobe Hernandez, all with the LA Galaxy, Real Salt Lake's David Ochoa and Julian Araujo, his teammate at Barca Academy.
Araujo signed with the LA Galaxy in 2019. Hoppe is the third Barca alum to make his first-team pro debut in 2020 after Bryce Duke (LAFC) and Caden Clark (New York Red Bulls).
The Barca Residency Academy was launched by Barcelona in 2017 and is based in Casa Grande, Arizona, at the former home of Real Salt Lake's residential program.