FIG. 1 is a perspective view of a support base for a baseball batting practice tee, showing our design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a side elevation view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a left end elevation view thereof; and,
FIG. 6 is a right end elevation view thereof.
The broken line showing in FIG. 1 is for illustrative purposes only and forms no part of the claimed design.