League-adjusted batting average (LABA) for each season in a particular league equals hits above league average [H - AB*(LgH-H)/(LgAB-AB)] divided by AB, which also equals H/AB - (LgH-H)/(LgAB-AB).
To find career LABA, a player's career hits above league average are divided by his career at bats. Data runs from 1876-2010. Since the advent of interleague play in 1997, the NL and AL have been treated as single league for calculating LABA. Players must have a minimum of 4800 career AB to appear in this quiz. A player's primary team is the one where he played the most games, though the years given are for his entire career. See first comment for team/franchise abbreviations.