By the time Gaius Appuleius Diocles retired from chariot-racing at age 42, he had amassed the equivalent of $15 billion, becoming the highest-paid athlete of all time. This third-century mosaic shows a charioteer from the white team: Diocles, who lived in the second century, spent most of his career racing for the red team.
Sources: The highest paid athlete of all time was a Roman Charioteer; if he had lived today he would have been worth $15 billion
https://www.thevintagenews.com/2017/01/18/the-highest-paid-athlete-of-all-time-was-a-roman-charioteer-if-he-had-lived-today-he-would-have-been-worth-15-billion/
