Double-A Hartford placed Carreras on the 7-day injured list April 25 with an unspecified injury.
He hadn't played since April 22 before landing on the IL. Carreras hit .271 with a .364 on-base percentage, two home runs and three steals in 56 plate appearances prior to suffering the injury. The Rockies added the 23-year-old shortstop to the 40-man roster back in November to protect him from being selected during the Rule 5 draft.