Browse All Abbreviation related to the Acronym Baseball. All abbreviations on this page are 13U means Age thirteen and under, 1B means First baseman, 2B means Second baseman, 2B means Double, 3B means Third baseman, A means Assist, AAABA means American Amateur Athletic Baseball Association, AAABA means All American Amateur Baseball Association, AAB means Adjusted At Bats, AABA means All American Baseball Alliance, AABA means Alexandria Area Baseball Association, AABC means American Amateur Baseball Congress, AABP means Anglo American Baseball Project, AAGPBL means All American Girls Professional Baseball League, ABBA means Amateur Baseball Bond Aruba, ABCA means American Baseball Coaches Association, ABDG means Amateur Baseball Development Group, ABE means Artificial Baseball Engine, ABL means Australian Baseball League, ABN means American Baseball Network,