McArthur allowed one hit and one walk over two scoreless innings to earn a save in Tuesday's 3-2 win over the Blue Jays.
Only two men were able to reach base against McArthur despite the 27-year-old pitching an additional inning Tuesday, though he failed to register a strikeout. The right-hander now has five saves on the young season and seems to have cemented himself as the Royals' primary closer.