[3] To increase their sons chances at a successful racing career, the Verhagen family moved form Ridgefield, Connecticut, to Mooresville, North Carolina, in 2014.

[12] In 2019, Verhagen lost his backing from Red Bull and moved to the BRDC British Formula 3 Championship with Double R Racing.

Verhagen moved to sportscar racing in 2020, driving for Walkenhorst Motorsport as part of the BMW Junior Team in two rounds of the Nürburgring Endurance Series.

[14] For the 2021 season, Verhagen stepped up to the SP9 Pro class to partner Daniel Harper and Max Hesse in a full-time campaign of the Nürburgring Endurance Series, where the trio would compete in a BMW M6 GT3 car.

[17] After taking their first points in Imola with a fourth-placed finish, the trio ended up fifth in the 24 Hours of Spa, beating their teammates in the sister car.

[18] A further points finish at the Hockenheimring left the American eleventh in the championship, one place ahead of the more experienced line-up of the other Rowe Racing entry.

[19] As a result of their accomplishments, Verhagen, Hesse and Harper were introduced as fully-fledged BMW works drivers before the 2023 season.