It's called Lena Blackburne Baseball Rubbing Mud, named for its creator. Blackburne, at various points in his career, was a player, coach, manager and scout in Major League Baseball.

How to Get Dried Mud Stains Out of Clothes Use a stiff brush to remove it from the clothing. Rinse as much mud/dirt as possible out with cold water. Spray the stain with an enzyme cleaner, such as ...