What does BF mean in softball?

In softball, BF stands for batters faced. It refers to the number of different batters a pitcher has faced during a game. BF is used to keep track of how many opportunities the pitcher has had to get outs or give up runs. For example, if a pitcher faces 20 different batters in a game, their BF would be 20. BF helps to measure a pitcher's effectiveness and workload during a game.