Mofokeng had joined Pirates from North West Province-based Brits Soccer Academy as a 16-year-old in February 2022.
Nicknamed Marcelo, the left-back turned out for Pirates' under-19 in the SAB Regional League in Gauteng.
Marcelo was later included in the club's DStv Diski Challenge squad before being loaned out to Wits.
Before joining the Brits Soccer Academy in December 2019, the lefty played for an amateur club called Cornelia which is based in the Free State.
GOAL extends its deepest condolences to the Mofokeng family, his loved ones, and Orlando Pirates.