Embodiments of golf club heads, golf clubs, and methods to manufacture golf club heads and golf clubs are generally described herein. In one example, a golf club head includes a body portion having an interior cavity, a ledge portion extending outward from a back wall of the body portion, a filler material comprising a rubber compound in the interior cavity, a first set of mass portions that is closer to a toe portion edge of the body portion than to a heel portion edge of the body portion, and a second set of mass portions that is closer to the heel portion edge than to the toe portion edge. A face portion is coupled to the body portion to enclose the interior cavity and includes at least one back groove located proximate to a perimeter edge of the face portion. Other examples and embodiments may be described and claimed.

A method of enhancing surface strike performance, includes providing a club head having a face surface and a receiving portion recessed into the club face. The receiving portion is configured to receive a strike surface material. The surface strike material is an amorphous ceramic material which is inserted as an inlay into the receiving portion as a liquid slurry. The slurry is distributed evenly within said receiving portion forming a uniform layer of ceramic material filling said receiving portion. Microgrooves are added to the ceramic material in a vertical direction to further increase the strike performance of the club head.

A golf club head includes a center of gravity spaced less than 5 mm from a vertical center plane that is perpendicular to a striking face plane and extends through a striking face center. The golf club head also includes a first component having a first melting point and a first density and a second component having a second melting point higher than the first melting point and a second density less than the first density. And the second component (i) is at least partially encapsulated by the first component, (ii) extends into a hosel portion below a hosel bore, and (iii) has a mass less than about 5 g.

Embodiments of golf club heads, golf clubs, and methods to manufacture golf club heads and golf clubs are generally described herein. In one example, a golf club head includes a body portion being hollow to define an interior cavity, a filler material in the interior cavity, and a face portion, which may include a face perimeter portion having a perimeter edge defined by a face toe edge, a face heel edge, a face top edge, and a face sole edge, a face recess portion on the back surface and having a recess perimeter portion at least partially surrounded by the face perimeter portion, and a plurality of back groove portions in the face recess portion. The plurality of back groove portions may extend proximate to the recess perimeter portion along at least 50% of the recess perimeter portion. Other examples and embodiments may be described and claimed.

Disclosed herein is an iron-type golf club head that comprises a strike plate, an enclosed internal cavity, and a rear aperture formed in a rear wall. The iron-type golf club head also comprises a stiffening plug, within the internal cavity and compressed between the back surface of the strike plate and the rear wall. The stiffening plug is insertable, through a rear aperture, into the internal cavity. The iron-type golf club head further comprises a rear fascia covering the rear aperture and at least a portion of the rear wall. A characteristic time (CT) at a geometric center of the strike face is at least 250 microseconds. A maximum thickness of the strike plate, at the strike face, is less than 3.5 millimeters, inclusive. The strike plate, excluding grooves, has a minimum thickness between 1.1 millimeters and 2.2 millimeters.

Embodiments of golf club heads, golf clubs, and methods to manufacture golf club heads and golf clubs are generally described herein. In one example, the golf club head may include a face portion having a front surface and a back surface opposite of the front surface. A back groove extends on the back surface proximate to a periphery of the face portion and includes a first groove portion, a second groove portion transverse to the first groove portion, and a curved groove transition portion connecting the first groove portion and the second groove portion. The golf club head includes a body portion coupled to the face portion and having an interior cavity. A filler material is in the interior cavity and at least partially fills the back groove. Other examples and embodiments may be described and claimed.

Embodiments of a golf club head with a textured strikeface and methods to form said club head through laser shock treatment are generally described herein. The golf club head can comprise a body and a strikeface. The strikeface has a textured front surface, with an array of indentions. Each indention can have a footprint area of between 0.01 μm.sup.2 (1×10.sup.−8 mm.sup.2) to 250,000 μm.sup.2 (0.25 mm.sup.2). The textured front surface can affect the spin imparted to a golf ball upon impact. Other embodiments may be described and claimed.

Embodiments of golf club heads and methods to manufacture golf club heads are generally described herein. In one example, an iron-type golf club head may include a hollow body portion having a toe portion, a heel portion, a top portion, a sole portion, a front portion, and a back portion. The back portion may have an upper back wall, a lower back wall, and a ledge portion connecting the upper back wall to the lower back wall. The golf club head may include an interior cavity in the hollow body portion and an elastic polymer material in the interior cavity. The interior cavity may have a maximum cavity width proximate to the ledge portion. The hollow body portion may include a first port located in the upper back wall and a second port located in the lower back wall. Other examples and embodiments may be described and claimed.

Embodiments of golf club heads and methods to manufacture golf club heads are generally described herein. In one example, a golf club head may include a body portion having a toe portion, a heel portion, a top portion, a sole portion, a front portion, a back portion, and an interior cavity. The interior cavity may include a central portion, a first internal channel extending from the toe portion to the central portion, and a second internal channel extending from the heel portion to the central portion. A face portion may be attached to the front portion to enclose the interior cavity. A first filler material may be in the central portion of the interior cavity. A second filler material may be in the first internal channel and the second internal channel. Other examples and embodiments may be described and claimed.

Embodiments of golf club heads with energy storage characteristics are presented herein. In some embodiments, a golf club head comprises a hollow body comprising a strikeface, a heel region, a toe region opposite the heel region, a sole, a top rail and an inflection point. The inflection point provides increase bending of the strikeface thereby providing performance enhancement over clubs without an inflection point.