Pittsburgh, which had been shut out in two games in a row, had 10 hits and drew 10 walks.
Matt Kemp went 3-for-5 with five RBIs, including a three-run homer, to pace the Dodgers, who had their four-game winning streak broken.
Pirates starter Trevor Williams, 0-1 over his past four starts, gave up four runs and four hits in three innings. Steven Brault (5-1) allowed three runs and three hits in 2 1/3 innings. Felipe Vazquez got four outs to notch his 11th save.
Los Angeles left-hander Caleb Ferguson, starting in his major league debut, had a rough 1 2/3 innings, allowing four runs. Daniel Hudson (1-2) gave up two runs, both unearned, and three hits in 1 1/3 innings.
In the second, Pittsburgh took a 4-0 lead on Harrison's three-run double and Starling Marte's RBI single.
The Dodgers tied it in the third with a two-out rally. Kemp hit a two-RBI double off the wall in center, and Cody Bellinger's 10th homer, a two-run shot to right, made it 4-4.
Colin Moran's fielder's choice coupled with an error by Dodgers first baseman Max Muncy gave Pittsburgh a 5-4 lead in the bottom of the third. Another run came in on pinch hitter Josh Bell's fielder's choice for a 6-4 Pittsburgh lead.
David Freese knocked in two more with a double in the fourth to make it 8-4.
The Dodgers closed to within 8-7 in the fifth on Kemp's 10th homer, a three-run blast to left-center.
Pittsburgh scored three more in the sixth for an 11-7 edge. Sean Rodriguez had an RBI single, and pinch hitter Gregory Polanco drove in two with a double.
In the eighth, a balk by Kyle Crick gifted Los Angeles a run, and Yasmani Grandal followed with an RBI single to make it 11-9.
--Field Level Media
LA Dodgers | Pittsburgh | |
Caleb Ferguson | Player | Trevor Williams |
No Decision | W/L | No Decision |
1.2 | IP | 3.0 |
3 | Strikeouts | 2 |
2 | Hits | 4 |
21.60 | ERA | 12.00 |
LA Dodgers | Pittsburgh | |
Matt Kemp | Player | Corey Dickerson |
3 | Hits | 3 |
5 | RBI | 0 |
1 | HR | 0 |
8 | TB | 3 |
.750 | Avg | .750 |
Team | Hits | HR | TB | Avg | LOB | K | RBI | BB | SB | Errors |
LA Dodgers | 8 | 2 | 16 | .242 | 15 | 6 | 8 | 8 | 0 | 1 |
Pittsburgh | 10 | 0 | 13 | .312 | 26 | 5 | 10 | 10 | 2 | 0 |