Perez (back/neck) is starting at first base and batting third Friday versus the Red Sox.
Perez was held out of Wednesday's series finale against the Pirates due to back/neck tightness, but he'll return to action heading into the Royals' three-game weekend series versus Boston, although he'll get a lighter defensive assignment. Freddy Fermin is catching Friday and Nick Loftin will make his MLB debut as the Royals' designated hitter.