MIAMI — Kevin Correia had one bad inning, and that was enough to doom the low-scoring Pittsburgh Pirates.

The Miami Marlins scored five times in the fourth inning, giving Josh Johnson plenty of cushion to beat the Pirates 6-2 on Tuesday night.

“He had his great stuff,” Pittsburgh catcher Michael McKenry said. “If you give him a lead, it’s kind of tough.”

Any deficit is tough for the Pirates, who rank last in the majors in runs. They mustered only six hits against Johnson and two relievers.

Correia (1-4) lasted just 3 2-3 innings, his shortest outing this year, and gave up a season-high six runs.

“My command just wasn’t real good,” the right-hander said. “When I miss, it’s a pretty good lineup, and they’re going to take advantage of it.”

Correia fell to 0-4 in his past five starts.

“It was just a tough night at the office for him,” Pirates manager Clint Hurdle said. “Everything seemed to be running about the same velocity. The command wasn’t sharp.”

Three Pirates relievers combined to pitch 4 1-3 shutout innings. The bullpen hasn’t allowed a run in the past five games.

But pitching hasn’t been Pittsburgh’s problem hitting has. Clint Barmes is batting .160, Pedro Alvarez .217 and Alex Presley .220.

Johnson (1-3) gave up two runs over seven innings for his first victory since April 19, 2011.