This Day in Sports History: Randy Johnson Throws a Perfect Game - Sports Illustrated
The best pitching performance ever for all 30 teams - ESPN
Top 10 starts in Oakland A's history - Athletics Nation
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Twinkie Town's favorite MLB teams ranked first to last - Twinkie Town
Randy Johnson's perfect game - Wikipedia
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Sandy Koufax: A Lefty's Legacy: 9780061779008: Leavy, Jane: Books
What is a perfect game in baseball? All-time list and more to know about MLB pitchers' most exclusive club
MLB® The Show™ - Ranked Season's Perfect Reward, Takashi Bundle, Moments, & Conquest map added in MLB® The Show™ 22