Early-bird Fall Ball Sign-Ups! The Diamond Bar Girls Fastpitch Softball League (DBGS) has worked with young ladies in Diamond Bar and surrounding communities for over 40 years. Our established recreational softball league consists of a Board of Directors and ASA certified manager, coaches, and officials. Girls from ages 4-18 are invited to join a team sport that offers fun, exercise, and teamwork as it builds character through sportsmanship. (DBGS is an ASA-registered softball league)