As most are aware, major league baseballs get rubbed down with mud before they are used in each game. For nearly 75 years, the Lena Blackburne Rubbing Mud gathered off the Delaware River in New Jersey has been used to rub the shine off of each brand new baseball. In the video below Newsworks.org takes a trip the Delaware River to see how the mud gets collected and documents its use once it makes it to major league baseball umpire rooms.