The Royals reinstated Singer (personal) from the restricted list Monday.
Singer was one of 10 Royals players who will rejoin the 26-man active roster after being ineligible to play during the four-game weekend series in Toronto due his vaccination status. Since his last start came Wednesday against the Tigers before he was placed on the restricted list Thursday, Singer didn't miss out on a start while he was deactivated. The 25-year-old right-hander finished the first half of the Royals' schedule with a 4-3 record, 4.02 ERA, 1.24 WHIP and 69:18 K:BB across 71.2 innings over his 14 appearances (11 starts) for the big club.