Baseball rubbing mud - wikipedia Baseball rubbing mud Delaware River, the general vicinity of the source of baseball rubbing mud Baseball rubbing mud is mud used to treat balls in the sport of baseball to give pitchers better control and a firmer grip on the balls. Contents 1 History 2 Usage 3 References 4 External links History Before the use of rubbing mud, baseballs were rubbed in a mixture of water and infield soil, but this method usually discolored the ball 's leather surface. Other alternatives at the time were tobacco juice, shoe polish, and soil from under stadium bleachers. They were able to successfully take off the sheen from baseballs, but at the same time, they also damaged and scratched the ball 's leather. While Lena Blackburne was a third - base coach for the Philadelphia Athletics baseball team, an umpire complained to him about the method used at the time, prompting Blackburne in 1938 to set out in search of better mud to use to rub against baseballs. Later that decade, Blackburne discovered the rubbing mud 's location ( said to be `` near '' Palmyra, New Jersey ) and founded the company that he used to sell it. According to the company, the entire American League used the mud soon after its discovery, and by the 1950s, it was in use by every major league team, along with some minor league and college teams. When age prevented Blackburne from harvesting the mud, he left the company to a friend, John Haas ; according to the company, Haas had accompanied Blackburne during his searches for an appropriate mud. Haas later left the company to his son - in - law Burns Bintliff, who in turn selected one of his nine children, current owner Jim, to carry on the business. Jim Bintliff told CNN reporter Thomas Andres in 2009 that the company only brought in about $ 20,000 per year ; at the time, he worked full - time as a printing press operator. Usage The mud originates from the New Jersey side of the Delaware River. The mud is cleaned and screened before sale. Each year Jim Bintliff visits the mud 's source and returns with 1,000 pounds of it to store over the winter and sells it the following baseball season. He told Andres : If anybody happens to catch me in the act of harvesting mud, I come up with a story to give them a reason I 'm putting mud in a bucket. I 've told people I use it in my garden, I use it for my rose bushes, I use it for bee stings and poison ivy and any kind of story. Before all major - and minor - league baseball games, an umpire or clubhouse attendant rubs six dozen or more balls with the mud to give them a rougher surface, to make them easier for pitchers to grip, and to comply with MLB Rule 4.01 ( c ), which states that all baseballs shall be `` properly rubbed so that the gloss is removed. '' The rubbing mud 's unique feature is that it is `` very fine, like thick chocolate pudding '', and it has been considered the `` perfect baseball - rubbing mud ''. References ^ Jump up to : Schneider, Jason ( 2006 - 07 - 04 ). `` All - American mud needed to take shine off baseballs ''. The Florida Times - Union. Retrieved 2009 - 10 - 06. Jump up ^ `` Secret Dirt 's Pivotal Role In Baseball ''. NPR. 2009 - 04 - 06. Retrieved 2009 - 10 - 06. ^ Jump up to : Nordell, John ( 2005 - 10 - 18 ). `` The dirt on baseball ''. The Christian Science Monitor. Retrieved 2009 - 10 - 06. ^ Jump up to : Andres, Thomas ( October 28, 2009 ). `` Harvesting baseball 's ' magic mud ' ''. CNN. Retrieved January 17, 2016. External links LenaBlackburne.com -- official site NewsWorks : Baseball 's Dirty little secret ( video ) Retrieved from `` https://en.wikipedia.org/w/index.php?title=Baseball_rubbing_mud&oldid=842384848 '' Categories : Baseball equipment Soil Palmyra, New Jersey Talk Contents About Wikipedia Deutsch Edit links This page was last edited on 22 May 2018, at 03 : 16 ( UTC ). Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. About Wikipedia

Question: where does the dirt for baseballs come from
Answer: the New Jersey side of the Delaware River