The Royals promoted Vaz from High-A Quad Cities to Double-A Northwest Arkansas on Monday.
Vaz will be making the jump to Double-A this week along with two of the Royals' other top position prospects in outfielder Gavin Cross and third baseman Cayden Wallace. Over 388 plate appearances at Quad Cities this season, the 22-year-old middle infielder slashed .267/.364/.387 with six home runs and 26 stolen bases in 86 games.
