Sandy Koufax is the only pitcher to win the pitching triple crown three times.

He did it with the Los Angeles Dodgers in 1963 (25-5, 1.88 ERA, 306 strikeouts), 1965 (26-8, 2.04 ERA, 382 strikeouts), and 1966 (27-9, 1.73 ERA, 317 strikeouts).