Question on Mack Reports

[AutomatedTeller]

In the YTD Batting options, there is something marked as BA%.

I can't figure out what that is. It's not mentioned in the glossary any where I can find and I can't find it using search.

What is that number supposed to represent?

thanks

AT

[RAY@HQ]

% likelihood player's BA is going up or down, based on BA/xBA gap