The ornamental design for a baseball, as shown and described.
FIG. 1 is a perspective view of a baseball according to a preferred embodiment of the present invention;
FIG. 2 is a front view of FIG. 1 taken along arrow 2;
FIG. 3 is a rear view of FIG. 1 taken along arrow 3;
FIG. 4 is a left side view of FIG. 1 taken along arrow 4;
FIG. 5 is a right side view of FIG. 1 taken along arrow 5;
FIG. 6 is a top view of FIG. 1 taken along arrow 6; and,
FIG. 7 is a bottom view of FIG. 1 taken along arrow 7.
The characteristic feature of the design resides in the color contrast of the two stripes coupled onto the outer surface of the baseball. The broken lines are included for the purpose of defining areas of the baseball that form no part of the claimed design.