MLB's 'magic mud' is only found in N.J. The coronavirus shutdown has hammered the company that supplies it - nj.com
Lena Blackburne Baseball Rubbing Mud
Lena Blackburne rubbing mud only foreign substance MLB allows doctor baseballs
Pro Pitchers' Dirty Secret Rubbed On Every Ball : NPR
Magic mud" used by every Major League Baseball team is harvested in southern New Jersey - 6abc Philadelphia
Magic Mud Baseballs - YouTube
How the Red Sox muddy-up baseballs for game use at Fenway – Boston Herald
He's Baseball's Only Mud Supplier. It's a Job He May Soon Lose. - The New York Times
New Jersey man making mud that helps pitchers throw the heat - ABC7 Los Angeles
Lena Blackburne Baseball Rubbing Mud - Frank's Sports Shop
Harvesting baseball's 'magic mud' - CNN.com
Famed N.J. mud used to rub up baseballs could be on the way out, MLB insider reports - nj.com
How the Red Sox muddy-up baseballs for game use at Fenway – Boston Herald
MLB Rumors: Window Shortened For Teams To Apply Mud On Baseballs
MLB leans on longtime mud supplier, not Rawlings, to coat balls - Sports Illustrated
Baseball's secret ingredient? Mud - The Washington Post
February 10, 1920 Lena Blackburne's Famous Baseball Rubbing Mud – Today in History
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The end of rubbing mud? MLB experiments with new baseballs - DRaysBay
