Amed Rosario has grown by leaps and bounds lately — with his glove and his bat. He took that in a literal sense Friday night.

The Mets shortstop saved Marcus Stroman in a sixth-inning jam with a highlight-reel, leaping catch on a line drive that had RBIs written all over it, and added three hits of his own on the way to a 7-6 walk-off win over the Nationals at Citi Field.

Rosario’s single with two outs in the ninth inning brought Michael Conforto to the plate to deliver the game-winning hit and send Citi Field into hysteria. The 23-year-old now has five multi-hit efforts in his past 10 games, batting .386 in that stretch. Going back even further, he is 38-for-104 (.365) over his past 27 games, continuing to give the Mets reason to believe he is growing into the player they hoped he would be.

“Rosie continues to be clutch,” Callaway said. “He gets big hits very often for us.”

But it was Rosario’s glove that made the most noise on this night. The game was tied 3-3 in the sixth inning when Stroman worked into trouble and put runners on the corners with no outs. The Mets got the first out when Kurt Suzuki grounded to Todd Frazier, who threw home to get Juan Soto out in a rundown. But the runners had advanced to second and third in the meantime, putting two runners in scoring position for Brian Dozier.

Dozier smoked a rising line drive (at 102.3 mph off the bat) toward shortstop. It had an expected batting average of .810, per MLB Statcast, but Rosario was having none of that as he jumped and outstretched his left arm as far above his head as he could to get his glove just high enough to catch it.

An intentional walk and a strikeout later, the Mets were out of the inning without a run scoring.

“Rosario was huge today,” Stroman said.

Rosario had struggled earlier in the season with his defense, but has worked with infield coach Gary DiSarcina to improve his pre-pitch setup, which has helped get him ready for snap plays like the one on Friday. It was one of the best plays manager Mickey Callaway has seen him play, he said.

“We were playing the three depth right there. Had we been in any closer, he probably doesn’t snag it and it gets by him,” Callaway said. “We’ve seen those sometimes kind of get through on him. He’s stepped up his game. For whatever reason, he has stepped it up and he is making every play.”