The Washington Nationals have acquired Kelvin Herrera in a trade with the Kansas City Royals for three prospects.

The Royals are receiving outfielder Blake Perkins, third baseman Kelvin Gutierrez and right-handed pitcher Yohanse Morel.

Herrera has 14 saves and a 1.05 ERA this season for the Royals, striking out 22 in 25 2/3 innings while walking just two batters.