Vizcaino's contract was selected by the Royals on Monday.
Vizcaino signed a minor-league contract with Kansas City in January and has posted a 1.76 ERA and 1.19 WHIP in 15.1 innings over 16 relief appearances at Triple-A Omaha this year. The 31-year-old hasn't made a major-league appearance since 2019 but will serve as an extra bullpen arm after the Royals placed several relievers on the COVID-19 injured list Monday.