| CPC A63B 53/0475 (2013.01) [A63B 2053/0479 (2013.01); A63B 60/54 (2015.10); A63B 2209/00 (2013.01)] | 20 Claims |

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1. A golf club head comprising:
a body portion comprising an interior portion, an exterior portion, a front portion, and a back portion with a back wall portion, the back wall portion comprising:
an outer surface;
an inner surface;
a perimeter portion;
a port connecting the exterior portion to the interior portion, the port having a port center portion; and
at least one rib portion located between the port and the perimeter portion, the at least one rib portion having a curved portion with a rib portion height extending into an interior of the body portion from the inner surface, a rib portion width, and a rib portion length;
a face portion coupled to the front portion; and
a filler material in the body portion coupled to the back wall portion and the face portion,
wherein a center of curvature of the curved portion of the at least one rib portion is located at or proximate to the port center portion, and
wherein the rib portion height or the rib portion width is greater than or equal to 0.020 inch (0.508 mm) and less than or equal to 0.150 inch (3.810 mm).
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