WASHINGTON —  Nationals slugger Adam Dunn hit his 300th career home run Saturday, ending Braves rookie Tommy Hanson's consecutive scoreless innings streak at 26 with the milestone blast.

Dunn hit a 2-2 fastball two-thirds of the way up the second deck in right field leading off the seventh inning, cutting Atlanta's lead to 3-1.

Dunn is the fifth major league player this season to reach the 300-homer plateau, joining Houston's Lance Berkman and Ivan Rodriguez, and Jermaine Dye and Paul Konerko of the Chicago White Sox.

The 29-year-old is the fifth player major league history to reach that total in less than 4,200 at-bats, succeeding in his 4,145th at-bat. The others are Babe Ruth (3,830), Mark McGwire (3,837), Ralph Kiner (3,883) and Harmon Killebrew (3,928).

Copyright 2009 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.