Welcome to the official site of Duncanville Boys Baseball, Inc. DBBI is a §501(C)(3) non-profit, all volunteer organization offering a complete baseball program where boys and girls learn sportsmanship & teamwork while having fun at the same time. Boys and girls can start at the age of 4 and continue in the program through the age of 18. DBBI does not have tryouts for recreational league play. Every player that signs up gets to play.