From Baseball Prospectus:
STAT OF THE DAY
Top 5 NL Offenses, by Equivalent Average (EqA)
Team, EqR, EqA
Cincinnati Reds, 355.0, .273
Florida Marlins, 331.1, .273
Los Angeles Dodgers, 331.5, .268
Chicago Cubs, 327.0, .267
Philadelphia Phillies, 326.3, .267
EQA =
Equivalent Average. A measure of total offensive value per out, with corrections for league offensive level, home park, and team pitching. EQA considers batting as well as baserunning, but not the value of a position player's defense. The EqA adjusted for all-time also has a correction for league difficulty. The scale is deliberately set to approximate that of batting average. League average EqA is equal to .260. EqA is derived from REqA, which is (H + TB + 1.5*(BB + HBP + SB) + SH + SF) divided by (AB + BB + HBP + SH + SF + CS + SB). REqA is then normalized to account for league difficulty and scale to create EqA.