September 26, 1981: Nolan Ryan breaks Koufax's mark with fifth no-hitter – Society for American Baseball Research

Looking at pitchers' performances before and after a no-hitter

The Snorting Bull: 2023

Nolan Ryan, Baseball Wiki

Nolan Ryan's incredible career should earn him the title of “best pitcher ever” - Beyond the Box Score

1981 09 26 NBC GOW - Dodgers at Astros (Nolan Ryan's 5th no hitter)

Cardboard appreciation: 1981 Topps 1980 NL Championships

Big Days in Astros History - September 26, 1981 - Nolan Ryan pitches his fifth no-hitter

Ryan strikes out 19 for third time

just four teams

2021 UCLA Baseball Information Guide by UCLA Athletics - Issuu

Nolan Ryan, Baseball Wiki

Does it surprise you that Nolan Ryan never pitched a perfect game despite throwing 7 no-hitters? - Quora

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