Final answer:
Stephen Curry's jersey sold the most in the NBA league in 2017 due to his popularity and on-court success.
Step-by-step explanation:
In 2017, Stephen Curry's jersey sold the most in the entire NBA league. Curry, who plays for the Golden State Warriors, is one of the highest-paid athletes in the NBA, earning around $43 million a year (Sports Illustrated 2020). His popularity and on-court success contributed to the high demand for his jersey among fans.