Which athlete's endorsement deal created a product line that generated over $3 billion in sales for Nike in 2019, more than 15 years after the athlete's retirement?

Athletic endorsements can transform both an athlete's career and a brand's market position. This trivia question explores one of the most financially significant athlete endorsement deals in sports retail history - a partnership that changed the landscape of sports marketing forever and created a revolutionary product line that continues to dominate the market decades later.

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Michael Jordan (Air Jordan)
LeBron James (LeBron signature line)
Serena Williams (Serena Williams Design Crew)
Cristiano Ronaldo (CR7)