McCullers did not factor in the decision against Kansas City on Wednesday, allowing four runs on five hits and four walks while striking out seven over 6.2 innings.
McCullers limited the Royals to one run through six innings but got into trouble in the seventh. After the right-handed hurler loaded the bases on a single and back-to-back walks with two outs, Cristian Javier came on and served up a grand slam to Whit Merrifield, with three of the runs charged to McCullers. The 27-year-old tied a season high with four walks in the contest and departed after throwing 107 pitches. He's expected to make his next start at Seattle early next week.