Witt was removed from Sunday's game against Minnesota due to right knee soreness.
It's unclear when the injury cropped up, but Witt was taken out of the game in the seventh inning and was replaced by Michael Massey. Witt went 0-for-4 with three strikeouts prior to his exit, and he'll undergo further tests to determine the severity of the injury. The Royals have an off-day Monday, so the 25-year-old shortstop will aim to be available for Tuesday's home game against the Rangers.