WASHINGTON — The Philadelphia Phillies are the NL East champions for the fourth consecutive year and, fittingly, Roy Halladay helped seal the deal this time with a two-hitter.

Halladay earned his 21st win with his fourth shutout and ninth complete game — all highs in the majors this season — and Jayson Werth drove in four runs, leading the Phillies to a 8-0 victory over the Washington Nationals on Monday night, wrapping up the division with five games left.

Halladay (21-10) heads to the playoffs for the first time in his 13th major league season, having played his entire career with the Toronto Blue Jays before being traded to Philadelphia last winter.