PITTSBURGH — The idea of experimenting with Amed Rosario in center field has been discarded, at least for now, by the Mets.

Rosario is a shortstop — an improving one with whom manager Mickey Callaway isn’t about to tinker.

“As an organization, we’re always going to be willing to do everything we can and think outside the box to be the best we can,” Callaway said before the Mets faced the Pirates on Friday. “The one thing we did focus on and knew we were going to focus on before we did anything with Rosie was to continue to try to help him develop at short and it seems like that is really paying off. For now we’ll continue just to focus at short and go from there.”

Rosario entered Friday shining on both sides of the ball. Offensively, he had posted an .879 OPS in his previous 37 games. And after a sluggish start to the season defensively, he committed only two errors in July and has shown improving range in recent weeks. Rosario endured a nightmarish stretch in April in which he committed seven errors in six games.

Suddenly, the Mets are getting the type of shortstop play they thought they would receive following Rosario’s promotion to the major leagues two years ago this week. He’s still only 23 years old.

“Earlier in the season when I was making some errors, there were things I needed to work on,” Rosario said through an interpreter. “Thank God for my hard work to just push me to where I am now.”

The task of getting Rosario right has fallen on infield coach Gary DiSarcina, who has preached getting into a pre-pitch setup that has the shortstop ready to pounce on grounders.

“This last seven- or 10-day stretch he’s really been good at angles,” DiSarcina said. “He’s going after balls at a better angle and putting himself in a position to make plays, where two weeks ago he doesn’t make the play. We just opened up his feet a little bit, which opens up his hips and allows him to move laterally and extend his range a little bit.”

Rosario’s footwork has improved, allowing him to extend an additional six to 12 inches on grounders, according to DiSarcina. The improvement came after front office officials showed Rosario a video displaying bad habits into which he had fallen with his footwork.

“He’s at the stage right now where he wants any ball hit to him,” DiSarcina said. “And I think he’s picked up some things fundamentally and his confidence is sky high. For him to be hitting so well and running the bases great, he’s playing with a high confidence level right now.”

Callaway had first broached the idea of center field to Rosario in late June. But the suggestion never gained enough steam that Rosario began taking balls in the outfield on more than an informal basis, shagging flies during batting practice.

The manager doesn’t discount the idea that Rosario’s surge offensively has led to improved defense.

“There’s so many factors that come into play, it’s hard to identify just one, but he does everything he can every day to be the best he can and maybe he’s really starting to click,” Callaway said. “You always kind of find that ‘aha’ moment in your career and then you start to take off. Maybe he’s found his.”