![Twenty-one years go, Randy Johnson made his Diamondbacks debut.](https://upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Randy_Johnson_04.jpg/800px-Randy_Johnson_04.jpg)
Randy Johnson's perfect game - Wikipedia
![Twenty-one years go, Randy Johnson made his Diamondbacks debut.](https://img.mlbstatic.com/mlb-images/image/private/t_16x9/t_w1024/mlb/npxetqorj2phdmrperp0)
Randy Johnson Pedro Martinez almost Expos teammates
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Heroic & Tragic & Joyous & Juvenile - by Sam Miller
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The Missed Phone Call that Changed the Course of Mariners History - Lookout Landing
![Twenty-one years go, Randy Johnson made his Diamondbacks debut.](https://cdn.theathletic.com/app/uploads/2018/07/29112027/GettyImages-52026945-1024x807.jpg)
Twenty years ago, the Astros' trade for Randy Johnson showed the possibilities — and costs — of rental players - The Athletic
![Twenty-one years go, Randy Johnson made his Diamondbacks debut.](https://baseballhall.org/sites/default/files/styles/story_popup_thumb_540/public/Johnson%20Randy%20165-2009-103_Act_NBL%20Tringali.jpg.jpeg?itok=LZexVDzt)
Astros' deal for Johnson launched Big Unit's NL run of excellence
![Twenty-one years go, Randy Johnson made his Diamondbacks debut.](https://cronkitenews.azpbs.org/wp-content/uploads/2021/09/happygame7-diamond-backs-800x500-1.jpg)
Randy Johnson's 20-K ball? Cooperstown nod to greatness
![Twenty-one years go, Randy Johnson made his Diamondbacks debut.](https://www.mercurynews.com/wp-content/uploads/2016/08/20090324__johnson1.jpg?w=435)
Giants' Randy Johnson 'a little rusty' – The Mercury News
![Twenty-one years go, Randy Johnson made his Diamondbacks debut.](https://cdn.vox-cdn.com/thumbor/hziHE8l76RphA65VpjbXwkqD4fc=/669x32:1477x667/1200x800/filters:focal(869x163:1195x489)/cdn.vox-cdn.com/uploads/chorus_image/image/70710000/51985922.0.jpg)
The All-Time MLB Team, left-handed starting pitchers: Randy Johnson and Sandy Koufax - AZ Snake Pit