Abstract: An iron-type golf club head includes a body having a wall extending about an opening, a faceplate coupled to the body across the opening, and a fill material. The wall defines a first set of apertures and a second aperture, and includes an outer peripheral surface, a sole and a rear wall portion extending from the heel to the toe. The wall and the faceplate define a rearward-facing back cavity. The sole, the rear wall portion and the faceplate define a lower cavity that is continuous with the back cavity. The first set of apertures and the second aperture extend through the wall from the peripheral outer surface to, and are continuous with, the lower cavity. The first set of apertures and the second aperture extend about first and second planes, respectively. The fill material substantially fills the lower cavity and the first set of apertures and the second aperture.

Abstract: An iron-type golf club head includes a body having a wall extending about an opening, a faceplate coupled to the body across the opening, first and second sets of apertures, and a fill material. The wall has an outer peripheral surface, a sole, a toe, a heel, a topline and a rear wall portion extending from the heel to the toe. The wall and the faceplate define a rearward-facing back cavity, and the sole, the rear wall portion and the faceplate define a lower cavity that is continuous with the back cavity. The first and second sets of apertures extend through the wall from the peripheral outer surface to, and are continuous with, the lower cavity. The first and second sets of apertures extend about first and second planes, respectively. The fill material substantially fills the lower cavity and the first and second sets of apertures.

Abstract: An iron-type golf club head includes a body having a wall extending about an opening, a faceplate coupled to the body across the opening, first and second sets of apertures, and a fill material. The wall has an outer peripheral surface, a sole, a toe, a heel, a topline and a rear wall portion extending from the heel to the toe. The wall and the faceplate define a rearward-facing back cavity, and the sole, the rear wall portion and the faceplate define a lower cavity that is continuous with the back cavity. The first and second sets of apertures extend through the wall from the peripheral outer surface to, and are continuous with, the lower cavity. The first and second sets of apertures extend about first and second planes, respectively. The fill material substantially fills the lower cavity and the first and second sets of apertures.

Abstract: An iron-type golf club head includes a body having a wall extending about an opening, a faceplate coupled to the body across the opening, a first set of apertures, and at least one second aperture. The wall has an outer peripheral surface, a sole, a toe and a topline. The wall and the faceplate define a rearward-facing cavity. The first set of apertures extends through the wall from the peripheral outer surface to the cavity. The first set of apertures extends about a first plane. The at least one second aperture extends through the wall from the peripheral outer surface to the cavity. The at least one second aperture extends about a second plane.

Abstract: A golf club head may comprise a hosel portion, a front strike face, a sole, a crown and micro-vortex generators projecting from a surface of the crown. The micro-vortex generators may comprise a first elongated micro-vortex generator angled with respect to the front strike face and a second elongated micro-vortex generator having a front end rearward of the first micro-vortex generator.

Abstract: An iron-type golf club head includes a body having a wall extending about an opening, a faceplate coupled to the body across the opening, a first set of apertures, and at least one second aperture. The wall has an outer peripheral surface, a sole, a toe and a topline. The wall and the faceplate define a rearward-facing cavity. The first set of apertures extends through the wall from the peripheral outer surface to the cavity. The first set of apertures extends about a first plane. The at least one second aperture extends through the wall from the peripheral outer surface to the cavity. The at least one second aperture extends about a second plane.