ABR

From SoSH

Adjusted Batting Runs - From Total Baseball. A measure of the number of runs a batter generates beyond what an average batter generates in the same number of plate appearances, park-adjusted. The formula is:

ABR = (.47)1B + (.78)2B + (1.09)3B + (1.40)HR + (.33)(BB + HB) - (.25)(AB - H) - (.50)OOB

where OOB is Outs On Base.

The -0.25 value for an out is modified depending on the league and season in question such that the league ABR total is zero (thus an ABR of zero means the batter was exactly average).