Usually AB is an offensive stat which stands for At Bat, meaning who is batting at the current moment.
BF usually stands for Batters Faced, used as a pitching stat next to how many batters that pitcher struck out (Batters faced is not used in computing a pitcher's ERA, or Earned Run Average. See http://en.wikipedia.org/wiki/Earned_run_average)
sacrifice
Win
On Base Percentage
k stands for strikeout looking K stands for strikeout swinging
Difference
Sacrifice. Either a sacrifice bunt or sacrifice fly. Neither counts as an at bat.
Blocked Attempts
Over-Time
LOB stands for Left On Base.
The position "p" is for pitcher.
Baseball Box Kick Face bbkf: boob bee kiddy face
The PF stands for personal fouls. While the position, "PF" is in fact power forward, "PF" when found on the score card and the box score stands for how many personal fouls the player committed.