 The same rubber ball that's used in the sport today. Rackets and balls all appeared in different shapes and forms over the years, and as the search for the ideal model of each continued, they eventually landed on what we see and use today in the sport of racquetball. Sobeck founded what was called the Paddle Racket Association in 1952, and he distributed a set of rules to all YMCAs in the United States of America to help spread the popularity of the sport.