Golf club heads and methods to manufacture golf club heads

A golf club head comprising:

• a hollow body portion having a volume of less than or equal to 100 cubic centimeters and comprising a first material having a first tensile strength and a first density, the hollow body portion comprising an interior portion, a front portion, a toe portion with a toe portion edge, a heel portion with a heel portion edge, a top portion with a top portion edge, a sole portion with a sole portion edge, a back portion having a back wall portion, and a mass portion located in the interior portion at or proximate to the toe portion edge, the back wall portion comprising:
• an upper back wall portion;
• a lower back wall portion;
• a ledge portion extending between the upper back wall portion and the lower back wall portion;
• a depression formed in the lower back wall portion at or proximate to the heel portion edge and the sole portion edge;
• a back wall portion opening on the upper back wall portion connected to the interior portion of the hollow body portion, the back wall portion opening extending from a location proximate to the ledge portion to a location proximate to the top portion edge and extending from a location proximate to the toe portion edge toward the heel portion edge;
• a plurality of reinforcement portions extending between opposite sides of the back wall portion opening;
• a first port connected to the interior portion, the first port comprising a first port first opening on the back wall portion and a first port second opening on the mass portion;
• a second port connected to the interior portion, the second port comprising a second port first opening on the back wall portion and a second port second opening inside a pocket portion located in the interior portion between the depression and the mass portion;
• a face portion coupled to the front portion;
• a filler material in the interior portion of the hollow body portion;
• and
• a cover portion coupled to the back wall portion over the back wall portion opening to close the back wall portion opening, the cover portion comprising a second material having a second tensile strength and a second density,
• wherein the second tensile strength is greater than the first tensile strength, and
• wherein the second density is less than the first density.