How many active baseball players (minimum 1,000 at-bats) have a career batting average of .325 or better?

Through the end of the 2000 season, there were four active players who had career batting averages above .325. They are:

1) Tony Gwynn – .338
2) Todd Helton – .336
3) Nomar Garciaparra – .333
4) Mike Piazza – .328