NCAA 1-9 Pitcher’s Mound
SECTION 9. a. The top of the pitcher’s rubber must be 10 inches above the top surface of home plate. The 10-inch height can be measured easily by the use of a line level. There should be a gradual slope of 1 inch per foot from a point 6 inches in front of the pitcher’s rubber to a point 6 feet toward home plate. From this point, the mound should slope and blend into the grade of the rest of the playing surface.
b. The top of the pitcher’s mound should be level with the top of the pitcher’s rubber, extending from the point 6 inches in front of the pitcher’s rubber to 22 inches behind the pitcher’s rubber and 18 inches from each end of the pitcher’s rubber. This gives a level area 5 feet wide and 34 inches deep that includes the 6-inch width of the pitcher’s rubber.
c. Maintenance of the pitching mound, before and during games, should be the responsibility of the home management. Unburnt brick clay, plastic blue or gray clay mixed with some of the existing soil is recommended for reconditioning worn out spots. It is recommended that the home management provide foul weather covers for the home-plate and mound areas.
d. Portable pitcher’s mounds are legal. Both teams must agree on their use before the visitors arrive at the game site.