MLB leans on longtime mud supplier, not Rawlings, to coat balls - Sports Illustrated
MLB reportedly used two different baseballs in games in 2021
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MLB Confirms It Used 2 Sets of Baseballs with Differing Weights During 2021 Season | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
Sticky baseballs: Explaining the physics of the latest scandal in Major League Baseball
Baseball Dimensions & Drawings | Dimensions.com
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MLB will change its baseballs after record home run rates | The Japan Times
MLB using different balls? Juiced balls? Here's why everybody is mad
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We X-Rayed Some MLB Baseballs. Here's What We Found. | FiveThirtyEight
A Brief History of the Baseball | Arts & Culture| Smithsonian Magazine