MIAMI — The Pittsburgh Pirates began Tuesday’s game as the best-hitting road team in the NL. Then they had to face Josh Johnson.

The Florida Marlins ace allowed only two hits in seven innings to help beat Pittsburgh 6-0 Tuesday night.

“If you’re going to start a franchise and pick a pitcher, you’re not going to go wrong picking him,” Pirates manager Clint Hurdle said.

Johnson held Pittsburgh hitless until Garrett Jones singled off the right-field wall to start the fifth inning. The Pirates’ only other hit was a single by pinch hitter John Bowker in the sixth. Both runners were erased on double plays, and the Marlins faced only one batter more than the minimum.

“You’re going to have those games in the big leagues,” Hurdle said. “There’s a handful of pitchers that stop you. Maybe you catch them when they’re off, get some men on base. We didn’t have either one of them tonight.”

Jones’ hit came on a 1-1 count and was the hardest-hit ball for the Pirates.

“It was a fastball down and in,” Jones said. “He was pitching me in most of the game. I was anticipating a heater and got one and put the good part of the bat on it.”

Paul Maholm (0-3) allowed six runs and lasted only 3 2-3 innings, his shortest outing in four starts.

“It stinks. I didn’t give the team a chance to win,” Maholm said. “Facing Johnson, you’ve got to be good and I wasn’t.”

Johnson (3-0) lowered his ERA to 1.00. He has allowed four hits or less in each of his four starts, and batters are hitting .112 against him.

Even so, he said, he can do better.

“Why not?” he said. “There’s always room to improve.”

That’s true: The right-hander has never thrown a shutout in 108 career starts. He was pulled by manager Edwin Rodriguez after throwing 98 pitches, 64 for strikes, and was fine with the decision.

“We were in agreement up 6-0,” Johnson said.

The Pirates came into the game batting .288 on the road. Against Johnson and two relievers, they struck out 12 times and were shut out for the second time this season.

Wildness hurt Maholm, who hit Mike Stanton with a pitch with two out in the second. After John Buck reached on an infield single, Emilio Bonifacio’s single loaded the bases.

Johnson — who batted .085 last year — then lined a pitch over the second baseman, and two runs scored.

“He Little-Leagued us,” Hurdle said.