Which athlete endorsement deal resulted in the highest percentage increase in sales within the first year of partnership?

Famous athlete endorsements can significantly impact sports brand performance, but do you know which partnerships have actually moved the needle most dramatically? This poll tests your knowledge of how celebrity endorsements translate to measurable business results in the sports retail industry. Think beyond just popularity to actual sales impact!

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Michael Jordan's original Nike deal (1984)
Stephen Curry's Under Armour partnership (2013)
Cristiano Ronaldo's lifetime Nike contract (2016)
Serena Williams' Puma collaboration (2002)