In honor of the 40th anniversary of the very first IRONMAN in Hawai'i, we're looking back on the athletes, moments, and stories that have made our sport what it is today. Today, we're asking for your input on the greatest male IRONMAN pro of all time from the USA. Tell us what you think!

Nothing quite matches the atmosphere during the final hour of an IRONMAN. #IMTX #IMNAChamps 🏊🚴🏃

2018 Memorial Hermann IRONMAN Texas