Team on base percentage is the number of times a team safely reaches base in a game divided by their total plate appearances. A player can reach base safely either via a hit, walk, or hits batsman.
More about Team On Base Percentage
The movie Moneyball brought widespread attention to the importance of on base percentage, though this statistic has long since stopped being a statistic that some teams could exploit as an advantage, as there is now widespread acceptance throughout the game of its importance. While players with the highest on base percentage usually bat in the top half of the lineup, to maintain a consistently high team on base percentage players throughout the lineup need to reach base consistently.