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MLB's 'magic mud' is only found in N.J. The coronavirus shutdown has hammered the company that supplies it - nj.com
Jim Garrett of the Arizona Diamonbacks will rub mud into more than 100 baseballs before Sydney game to continue a 75-year-old tradition | The Courier Mail
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Major League Baseball's Dirtiest Tradition May End With New Chemically Treated Balls | HuffPost Sports
![Miracle Mud: Lena Blackburne and the Secret Mud That Changed Baseball: Kelly, David A., Dominguez, Oliver: 9780761380924: Amazon.com: Books Miracle Mud: Lena Blackburne and the Secret Mud That Changed Baseball: Kelly, David A., Dominguez, Oliver: 9780761380924: Amazon.com: Books](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/91nMj9XY9RL._AC_UF1000,1000_QL80_.jpg)