The term B.A. OR R.B.I. is an acronym for 'Batting Average or Runs Batted In'. This is a statistic used in baseball to measure a player's performance at the plate. Batting Average is calculated by dividing the number of hits by the number of at-bats, while Runs Batted In is the total number of runs a player has driven in with their hits. Both of these stats are important in determining a player's overall offensive production. The crossword solution for this term is STAT, which stands for 'STATISTICS'.