3D model of a baseball field, bat and ball modelled in Blender v2.69.
The baseball field is mapped with UV map (using the texture field.jpg). It's good for aerial view. Even if that texture is big, it isn't bigger enough for scene near the soil.
I provide in the ZIP the texture for use a procedural mapping as show in the image 14th and 15th:
the texture grass.jpg and grass2.jpg for the grass and the clay.jpg for the clay court.
For use the procedural mapping you have to map manually the texture on the materials.