Jayson Werth knew this season's NL Division Series defeat following a division title felt different from the same scenarios that played out for the Washington Nationals a couple of other times recently. ''I don't know,'' the team's left fielder said, then repeated that phrase in a silent, somber clubhouse in the early hours of Friday after a 4-3 loss to the Los Angeles Dodgers in Game 5. For the third time in five years, Werth and Washington won the NL East.