Alvin Kraenzlein

Alvin Christian "Al" Kraenzlein was an American track-and-field athlete known as "the father of the modern hurdling technique". He was the first sportsman in the history of the Olympic games to win four individual gold medals in a single discipline at the 1900 Summer Olympics in Paris. As of 2016, Alvin Kraenzlein is the only track-and-field athlete who has won four individual titles at one Olympics. Kraenzlein is also known for developing a pioneering technique of straight-leg hurdling, which allowed him to set two world hurdle records. He is an Olympic Hall of Fame (1984) and National Track and Field Hall of Fame (1974) inductee.