Anderson (1-1) allowed a hit and struck out one without walking a batter over a scoreless inning, earning the win in Game 1 of Wednesday's doubleheader versus the White Sox.
Wacha (1-2) was charged with the loss in Game 2 of Wednesday's doubleheader against the White Sox after he gave up two runs on four hits and two walks across six innings. He struck out four.
McArthur earned the save in the first game of Wednesday's doubleheader against the White Sox, allowing one hit while recording a strikeout in a scoreless ninth inning.
Singer did not factor into the decision in the first game of Wednesday's doubleheader against the White Sox, allowing two runs on three hits and three walks over five innings. He struck out five.
Royals manager Matt Quatraro said Monday that Massey (back) will travel with Triple-A Omaha this week as part of his rehab assignment, Anne Rogers of MLB.com reports.
Perez said Monday that an MRI revealed a Grade 1 groin strain, and he hopes to play Tuesday against the White Sox, Joel Goldberg of Bally Sports Kansas City reports.