morris of course: Our Jerry Koosman put stamp on baseball history
Mets retiring No. 36 of ex-pitcher Koosman in '20 - ESPN
Tom Seaver, 'The Franchise,' is still the Mets' brightest star
Tom Seaver, Mets Hall of Fame pitcher, dies
1969 Topps Jerry Koosman (All-Star)
September 30, 1979: Jerry Koosman reaches 20-win plateau for second time – Society for American Baseball Research