Golf club heads and methods to manufacture golf club heads

A golf club head comprising:

• a body portion having a volume of less than or equal to 100 cubic centimeters, the body portion comprising a first material having a first density, an interior cavity, a toe portion with a toe portion edge, a heel portion with a heel portion edge, a front opening at a front portion, a back portion having a back wall portion, and a top portion;
• a reference coordinate system comprising a horizontal x-axis, a vertical y-axis orthogonal to the x-axis, and a z-axis orthogonal to both the x-axis and the y-axis;
• a center of gravity located at x-coordinate location CGX, y-coordinate location CGY, and z-coordinate location CGZ;
• a face portion coupled to the front portion to close the front opening, the face portion comprising at least one back groove portion;
• a filler material in the interior cavity;
• a coefficient of restitution of greater than or equal to 0.81;
• a first mass portion coupled to the body portion, the first mass portion comprising a second material having a second density different from the first density;
• and
• a second mass portion coupled to the body portion, the second mass portion comprising a third material having a third density different from the first density, the second mass portion having a second mass portion center of gravity located at x-coordinate location CGM2X, y-coordinate location CGM2Y, and z-coordinate location CGM2Z,
• wherein a distance between the second mass portion and the toe portion edge is greater than or equal to 0.1 inch and less than or equal to 0.25 inch,
• wherein a distance on the x-axis between CGM2X and CGX is greater than or equal to 0.5 inch and less than or equal to 2.0 inch,
• wherein a distance on the y-axis between CGM2Y and CGY is less than or equal to 0.5 inch, and
• wherein a distance on the z-axis between CGM2Z and CGZ is less than or equal to 0.5 inch.

A golf club head comprising:

• a body portion having a volume of less than or equal to 100 cubic centimeters, the body portion comprising an interior cavity, a toe portion with a toe portion edge, a heel portion with a heel portion edge, a front opening at a front portion, a back portion having a back wall portion, and a top portion;
• a reference coordinate system comprising a horizontal x-axis, a vertical y-axis orthogonal to the x-axis, and a z-axis orthogonal to both the x-axis and the y-axis;
• a center of gravity located at x-coordinate location CGX, y-coordinate location CGY, and z-coordinate location CGZ;
• a face portion coupled to the front portion to close the front opening, the face portion comprising at least one back groove portion;
• a filler material in the interior cavity;
• a coefficient of restitution of greater than or equal to 0.81;
• a first mass portion coupled to the body portion, the first mass portion having a first mass portion center of gravity located at x-coordinate location CGM1X, y-coordinate location CGM1Y, and z-coordinate location CGM1Z;
• and
• a second mass portion coupled to the body portion, the second mass portion having a second mass portion center of gravity located at x-coordinate location CGM2X, y-coordinate location CGM2Y, and z-coordinate location CGM2Z,
• wherein a ratio of a weight of the second mass portion to a weight of the first mass portion is greater than or equal to 1.0,
• wherein a shape of the first mass portion is different from a shape of the second mass portion,
• wherein a distance on the x-axis between CGM1X and CGM2X is greater than or equal to 0.5 inch and less than or equal to 2.0 inch,
• wherein a distance on the y-axis between CGM1Y and CGM2Y is less than or equal to 0.25 inch, and
• wherein a distance on the z-axis between CGM1Z and CGM2Z is less than or equal to 0.1 inch.