Jeremy Guthrie retired the final 19 batters in Kansas City’s first complete game this season, and the Royals beat Arizona 6-2 on Thursday night for a three-game interleague sweep of the Diamondbacks.

Guthrie (8-9) allowed seven hits, struck out four and walked none in his eighth career complete game.

Alex Gordon hit a two-run homer and Alcides Escobar had a two-run single for the Royals, who have won four in a row and 12 of 15 to pull within 2 1/2 games of first-place Detroit in the AL Central.