The term diamond sports refers to recreational variants of baseball, a bat-and-ball sport. The major sport most related to baseball is the Olympic discipline of softball, with the two sports being administered internationally alongside Baseball5 by the World Baseball Softball Confederation.

A Spalding Hi-Bounce Ball, often called a Spaldeen or a Pensie Pinkie, is a rubber ball, described as a tennis ball core without the felt. These balls are commonly used in street games developed in the mid-20th century, such as Chinese handball, Australian Handball, stoop ball, hit-the-penny, butts up, handball, punchball, boxball, half-rubber, Wireball and stickball.