Atlanta's Tommy Hanson extended his scoreless innings streak to 26 before Adam Dunn's 300th career homer and the Washington Nationals rallied for four eighth-inning runs and a 5-3 victory over the Braves Saturday.

Hanson departed with a 3-1 lead after seven innings and was in line for his fifth straight victory before the Braves bullpen blew up, halting Atlanta's winning streak at a season-high five.

Mike Gonzalez (3-1) loaded the bases in the eighth on a pinch-hit single by Ronnie Belliard and a pair of walks before Peter Moylan relieved and yielded a two-run, game-tying single to Ryan Zimmerman.

Eric O'Flaherty replaced Moylan and was greeted by Dunn's decisive single up the middle for a 4-3 lead. Josh Willingham followed with an RBI single to left.