Not sure how many of you follow motorcycle racing, but MotoGP is equivalent to F1 in motorcycle racing, and he won the championship in 2006 when he was riding for Repsol Honda. The last American to win the championship. Succumbed to injuries from a cycling crash last week.
http://www.motogp.com/en/news/2017/05/22/nicky-hayden-passes-away/228157
http://www.motogp.com/en/news/2017/05/22/nicky-hayden-passes-away/228157