WASHINGTON — Getting a jump on the trade deadline to add talent to the back of their bullpen, the Washington Nationals picked up right-hander Kelvin Herrera from the Kansas City Royals on Monday for three minor leaguers.

The Nationals sent infielder Kelvin Gutierrez, outfielder Blake Perkins and 17-year-old pitcher Yohanse Morel to Kansas City in the deal announced during Washington’s doubleheader against the New York Yankees.

Herrera has 14 saves and a 1.05 ERA this season. He’s allowed three earned runs in 25 2/3 innings while striking out 22 batters and walking two.

“It’s just a moment you don’t want to see,” Herrera said about leaving KC. “It’s always hard. I was born and raised (as) a player here.”

The 28-year-old is a two-time AL All-Star who helped Kansas City win the 2015 World Series — and is among the last players left from that title team. He is 23-27 with 57 saves and a 2.75 ERA across 442 games in relief over eight seasons in the majors.

“We’ve known Kelvin since he signed with us when he was 16 years old. He’s one of the very best competitors that I’ve ever been around, probably that this organization has seen,” Royals general manager Dayton Moore said. “Without him, there is no way we can ever make it to the World Series, win a World Series.”

Herrera joins lefty closer Sean Doolittle and eighth-inning righty Ryan Madson in the back of Washington’s bullpen. Brandon Kintzler, the usual seventh-inning man for Washington, went on the disabled list June 10 with a right forearm flexor strain.

Instead of waiting to make moves at the July 31 non-waiver deadline, the Nationals opted to strike now. They are the two-time reigning NL East champions but have never won a postseason series. Washington also currently stands in second place in the division, entering Monday 3½ games behind the Atlanta Braves.

The Royals, meanwhile, are already way out of contention in the AL Central in last place and 22-49 going into the day.