Golf ball
FIG. 1 is a front view along the equator of my new and ornamental design for a golf ball; 
     FIG. 2 is a rear view of the golf ball of FIG. 1; 
     FIG. 3 is a right side view of the golf ball of FIG. 1; 
     FIG. 4 is a left side view of the golf ball of FIG. 1; 
     FIG. 5 is a top view from the north pole of the golf ball of FIG. 1; and, 
     FIG. 6 is a bottom view from the south pole of the golf ball of FIG. 1.