FIG. 1 is a bottom perspective view of a portion of a golf club head showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a toe end view thereof; and,

FIG. 5 is a heel end view thereof.

The broken lines immediately adjacent to the shaded regions form unclaimed boundaries of the design. The broken line showing of the remainder of the golf club head is for illustrative purposes only and forms no part of the claimed design.