Right-hander Kelvin Herrera has been acquired by the Washington Nationals from the Kansas City Royals for three minor leaguers.

The Nationals sent infielder Kelvin Gutierrez, outfielder Blake Perkins and right-hander 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.