Abstract: A removable pitching rubber comprised of a pitching pad and a rigid metal plate secured to the pad, at least one metal post extending downwardly from the plate for insertion into a prearranged ground anchor embedded in the ground so as to provide a stationary mount for the pitching rubber. In one embodiment of the invention, a pair of spikes extend downwardly from the bottom of the plate relatively adjacent the ends of the plate, with the spikes, when embedded in the ground, serving to prevent the movement of the outer edges of said pitching pad and plate.

Abstract: A removable pitching rubber comprising a pitching pad and a rigid metal plate removably connected to the pad, and at least two metal posts extending downwardly from the plate for insertion into prearranged ground anchors embedded in the ground so as to provide a stationary mount for the pitching rubber. The removable connection between the plate and the pad permits the pad to be separated from the plate and replaced when worn. The plate is formed with a downwardly turned lip at each longitudinal edge, the lips penetrating the ground when the pitching rubber is installed to stabilize the rubber.

Abstract: A removable pitching rubber comprised of a pitching pad and a rigid metal plate secured to the pad, at least one metal post extending downwardly from the plate for insertion into a prearranged ground anchor embedded in the ground so as to provide a stationary mount for the pitching rubber. In one embodiment of the invention, a pair of spikes extend downwardly from the bottom of the plate relatively adjacent the ends of the plate, with the spikes, when embedded in the ground, serving to prevent the movement of the outer edges of said pitching pad and plate.

Abstract: A device used to assist in constructing and repairing a pitcher's mound on a playing surface in a baseball field. An upper limit to the pitcher's mound is indicated by a beam apparatus. The beam apparatus has a horizontal extension member for indicating a plane above the playing surface that lies substantially parallel to the playing surface. An angled extension member is disposed to angle down a slope from a point where connected to the horizontal extension member. A support device supports the horizontal extension member of the beam at a chosen position above the playing surface.

Abstract: A portable pitching mound includes a generally convex body member having detachably securable front and rear portions. The rear portion has top and bottom surfaces with a peripheral edge extending therebetween. The front portion is detachably secured to the rear portion along a portion of the peripheral edge. The front portion has a top surface that includes a hollow for receiving a dense soil mixture to make a realistic, yet portable pitching mound.

Abstract: A portable pitching mound base has a network of structural elements with a flat bottom and generally circular periphery providing support for a cover which presents a flat top in the center and inclined sides sloping downward towards the periphery. The base is made in two halves with structural partitions at the dividing plane having access ports to allow lifting means such as a forklift, truck. The cover may be made of sheet material with metal mesh or with sheet aluminum having surrounding ridges to hold the overlying dirt of a pitcher's mound.