Did you see the little white bag pitchers in MLB smack against their hands before a big pitch? The post From Screenprinter to MLB’s Rosin Bag King: How a Bay Area Man Became Baseball’s Exclusive ...

But Grems connected Phillips to an MLB executive, and the two sides started talking about a standardized rosin bag. Rosin bags are made from a sap that’s pulled from pine trees in Honduras ...

The findings corroborate assertions by San Diego Padres pitcher Yu Darvish and many other Japanese ballplayers that “MLB balls are slipperier.” The powder in rosin bags is the only legal ...