Jerry Koosman Baseball Stats by Baseball Almanac
This is our year: The best seasons in Twins history - Twinkie Town
Baseball 1857 through 1993 UNCENSORED
Yogi Berra: Baseball's Original Mr. Clutch
MORE
Tom Seaver, Baseball Wiki
April 23, 1969: Jerry Koosman gets his first win in Mets' miracle season – Society for American Baseball Research
What MLB players were inducted in the Baseball Hall of Fame in the '50s and '60s? - Quora
Mets announce Jerry Koosman number retirement date –
All Time Mets
Forgotten Twins Greats: Dave Goltz - Twins - Twins Daily