PITTSBURGH — Jeff Locke doesn’t have the same electric stuff as the other four guys in Pittsburgh’s rotation.

The left-hander has to find different ways to put up zeros. When his curveball obeys the way it did in Tuesday night’s 5-1 win over Miami, Locke fits in quite well.

Avoiding the major trouble that has plagued him at times this season, Locke tossed 5 2/3 shutout innings to pick up his first victory in nearly six weeks and extend Pittsburgh’s winning streak to five.

From Locke’s perspective, he is just trying to keep pace on a rotation that ranks second in the majors in ERA behind the power arms of A.J. Burnett and Gerrit Cole.

“Everybody has been throwing the ball so well,” Locke said. “You never want to feel like the weakest link, not that you ever do. You never want to feel like you let anybody down. You just want to keep it going as long as you can.”

Locke (3-2) wasn’t exactly crisp, needing 104 pitches to get 17 outs while walking four and striking out six. Yet he wriggled free whenever Miami threatened. The Marlins left 10 runners on base and went 1 for 6 with runners in scoring position.

Neil Walker hit a two-run homer as the Pirates moved back above .500 (23-22), and Josh Harrison and Jung Ho Kang had two hits apiece. Pittsburgh is batting .306 during its winning streak while raising its team batting average to .250. Heady territory considering the Pirates were mired around .220 at the beginning of the month.

“It’s been more consistent team at-bats,” Harrison said. “You know early in the year we showed flashes of here or there but it wasn’t throughout the lineup. That’s how we are when our whole lineup is like that, we’re a dangerous team.”

Miami rookie Jose Urena (0-1) failed to make it out of the fifth inning in his first big league start, giving up five runs in 4 2/3 innings. Martin Prado had an RBI double and Christian Yelich added two hits for Miami, which fell to 2-7 under manager Dan Jennings.

The Marlins recalled the 23-year-old Urena from Triple-A earlier in the day to make a spot start for a rotation beset by injuries. Urena was an impressive 4-0 with a 1.22 ERA in the minors, but the Pirates made quick work of his mid-90s fastball and scored all five of their runs with two outs.

“I felt when I had two strikes that I had the hitter done already,” Urena said. “I made a mistake up in the zone and those are things you learn as a rookie.”

Kang singled home Harrison to give Pittsburgh the lead in the first. Harrison — who has multiple hits in six of his last 11 games — doubled home Jordy Mercer in the third.