Jim "Catfish" Hunter

From 1965 to 1979, he was a pitcher for the Kansas City / Oakland Athletics and New York Yankees. Hunter was the first pitcher since 1915 to win 200 games by age 31. He is often referred to as baseball's first big-money free agent, and was a member of five World Series championship teams. He also became only the fourth (and last) American League pitcher to win 20 games in a season for five consecutive seasons (1971–1975).