Rubbing Mud: The Hidden Relief Ace - Baseball ProspectusBaseball
Why do they put mud on baseballs before MLB games? - Quora
MLB leans on longtime mud supplier, not Rawlings, to coat balls
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Will MLB Say Goodbye to Lena Blackburne Rubbing Mud?
Worcester Red Sox Lena Blackburne baseball rubbing mud Polar Park
He provides MLB with all the mud for the baseballs! #baseball #fyp
Major League Baseball rubs its balls in Jersey mud
Count on pitchers continuing to use pine tar - ESPN
Famed N.J. mud used to rub up baseballs could be on the way out
