The Science That Makes Baseball Mud ‘Magical’

“This is the magical thing: It spreads like face cream and grips like sandpaper,” says Douglas Jerolmack, Edmund J. and Louise W. Kahn Endowed Term Professor of Earth and Environmental Science, about mud that has coated all the balls used in Major League Baseball for decades. In a new study, Jerolmack and colleagues found what they consider to be remarkable mechanical properties of this mud.