A hollow golf club head includes a metallic body, a club face, and a polymeric insert that cooperate to at least partially define a closed internal cavity. The metallic body includes a sole, a topline, and a rear wall defining an opening, with the rear wall being disposed between the topline and the sole. The club face is disposed between the topline and the sole, and on an opposite side of the sole from the rear wall. A strut extends across the opening and is secured to the body, and a polymeric insert covers the opening and is secured both to the body and to the strut.