Blanco is absent from the lineup for Wednesday's game in Seattle.
Blanco went 3-for-3 with a double, a two-run home run and four runs scored in Thursday's win over the Angels.
Blanco secured two stolen bases in Sunday's 3-2 extra-inning loss to the Rangers.
Blanco went 0-for-1 with a stolen base and a run scored in Friday's 7-1 win over the Rangers.
Blanco stole a base as a pinch runner in Tuesday's 4-3 extra-inning win over the Astros.
Blanco stole two bases and scored a run as a pinch runner in Monday's 6-4 loss to the Orioles.
Manager Matt Quatraro informed Blanco that he'll be on the Royals' Opening Day roster, Anne Rogers of MLB.com reports Saturday.
Blanco (calf) is starting in center field Tuesday against the Giants.
Blanco has been diagnosed with a mild calf strain following an MRI, Anne Rogers of MLB.com reports.
Blanco will undergo an MRI on his calf Monday, Anne Rogers of MLB.com reports.