Nate Karns allowed three runs on seven hits over six innings and had six strikeouts in his start Friday at Double-A Harrisburg.
Karns didn't make it out of the first inning in his previous outing, so it was a much needed return to form. if Ross Detwiler (back) requires an extended absence, Karns could find his way into the Nationals' plans. He has a 4.38 ERA and 46 strikeouts over 39 innings (eight starts) at the Double-A level this season.
Luis Mendoza allowed just two runs on eight hits over six innings in his start Sunday against the Athletics.
Mendoza earned his first win earlier this week, and has put together three straight quality starts. He would have been in line for his second win, but the Royals' bullpen gave up a home run to Yoenis Cespedes in the eighth inning that cost him the game. Mendoza has a 5.50 ERA in seven appearances (six starts) this season.