17-year-old Gio Reyna subs on for Dortmund, becoming the youngest American to play in UEFA Champions League! 🇺🇸
— Paul Carr (@PaulCarr) February 18, 2020
🇺🇸 Gio Reyna (17 yrs, 97 days)
🇺🇸 Gedion Zelalem (17-317)
🇺🇸 Christian Pulisic (17-362)