Sandy Koufax, Juan Marichal, Bob Gibson, Gaylord Perry 1966

Who was the greatest MLB pitcher of the 1960s: Don Drysdale, Bob Gibson, Mickey Lolich, Sandy Koufax, Juan Marichal, or Whitey Ford? - Quora

Who was the greatest MLB pitcher of the 1960s: Don Drysdale, Bob Gibson, Mickey Lolich, Sandy Koufax, Juan Marichal, or Whitey Ford? - Quora

Lot of (3) Topps Baseball Cards With 1971 #450 Bob Gibson, 1972 #130 Bob Gibson, 1967 #236 NL Pitching Leaders / Sandy Koufax / Juan Marichal / Bob Gibson / Gaylord Perry

The best five-year pitching peaks - ESPN - SweetSpot- ESPN

#236 Gibson/Koufax/Marichal/Perry NL Pitching Leaders - 1967 Topps Baseball Cards (Star) Graded FGS 9

Smoltz 4th Michigan-born player elected to Baseball HOF

Uncle Mike's Musings: A Yankees Blog and More: Bob Gibson, 1935-2020

1967 Topps #236 - Bob Gibson / Sandy Koufax / Juan Marichal / Gaylord Perry NL Pitching Leaders 5 - EX

All-time best pitching seasons in Giants history