If someone were to set the single-game strikeout record this season, it could be Gerrit Cole - The Crawfish Boxes
List of Major League Baseball single-game strikeout leaders - Wikipedia
Kerry Wood – Society for American Baseball Research
Today in Cubs history: Celebrating the day Kerry Wood struck out 20 Astros - Bleed Cubbie Blue
Kerry Wood's 20 K Game Was the Best Start of All Time - Cubs Insider
May 6, 1998: Kerry Wood's 20 strikeout game
The 10 greatest baseball games in Wrigley Field history - Sports Illustrated
Jeff Bagwell recalls Kerry Wood 20-strikeout game: 'The whole day was surreal' – NBC Sports Chicago
20 The History Behind Kerry Wood's 20 Strikeout Game
Celebrating Kerry Wood and the best pitching performances of all time - Beyond the Box Score