Golf club heads and methods to manufacture golf club heads

A golf club head comprising:

• a hollow body portion having a toe portion with a toe portion edge, a heel portion with a heel portion edge and a hosel portion, a top portion with a top portion edge, a sole portion with a sole portion edge, a front portion, and a back portion with a back wall portion;
• a face portion coupled to the body portion enclosing the front portion to create a first interior cavity;
• a hosel transition portion between the first interior cavity and the hosel portion;
• a second interior cavity extending into the hosel transition portion and connected to the first interior cavity;
• a groove on the back wall portion extending from the toe portion edge toward the heel portion edge;
• a first port above the groove;
• and
• a second port below the groove,
• wherein a distance between the first port and the toe portion edge is substantially less than a distance between the second port and the hosel portion,
• wherein the first port or the second port is connected to the first interior cavity to provide a connected port,
• wherein the first interior cavity and the second interior cavity are at least partially filled with a polymer material from the connected port,
• wherein the groove is below a horizontal midplane of the body portion and above the second port, and
• wherein a distance between the groove and the horizontal midplane increases from the toe portion edge toward the heel portion edge.

A golf club head comprising:

• a hollow body portion comprising a material associated with a first density, the body portion having a toe portion with a toe portion edge, a heel portion with a heel portion edge and a hosel portion, a top portion with a top portion edge, a sole portion with a sole portion edge, a front portion, and a back portion with a back wall portion including a groove extending from the toe portion edge to the heel portion edge;
• a face portion coupled to the body portion enclosing the front portion to create a first interior cavity;
• a hosel transition portion between the first interior cavity and the hosel portion;
• a second interior cavity extending into the hosel transition portion and connected to the first interior cavity, the second interior cavity extending from a location at or proximate to a top edge portion of the top portion to a location at or proximate to a sole edge portion of the sole portion, and the second interior cavity extending from the face portion toward the hosel portion;
• a first port;
• and
• a second port,
• wherein a distance from the first port to the top portion edge is substantially less than a distance between the first port and the sole portion edge,
• wherein a distance from the first port to the toe portion edge is substantially less than a distance from the first port to the hosel portion,
• wherein a distance from the second port to the top portion edge is substantially greater than a distance between the second port and the sole portion edge,
• wherein a distance from the second port to the toe portion edge is less than a distance from the second port to the hosel portion,
• wherein the first port or the second port is connected to the first interior cavity to provide a connected port,
• wherein the first interior cavity and the second interior cavity are at least partially filled with a polymer material from the connected port, and
• wherein a distance between the second port and the groove is less than a distance between the first port and the groove.