Spent his first eight years in Middelburg, South Africa before the family moved to Perth, Australia. The Potgieters eventually returned to South Africa, settling in Mossel Bay at the end of 2021 and shortly after Aldrich's 17th birthday.

Grew up competing in wrestling and rugby. Began wrestling around the time he was eight years old, after the family moved to Perth, Australia.

Enjoys fishing and is known to travel with fishing rods.

Won the 2022 Amateur Championship roughly three months before his 18th birthday, which made him the second-youngest winner in the history of the event. At the time, the only champion younger than Potgieter was Matteo Manassero, who won the 2009 Amateur Championship at the age of 16. Potgieter was the third South African to win The Amateur, joining Bobby Cole (1966) and Jovan Rebula (2018).

Other notable amateur victories included the 2021 Western Australia Amateur, 2022 South African Boys U19 Championship, 2023 African Amateur Stroke Play Championship, and 2023 Junior Invitational at Sage Valley.