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).