Carreras was not claimed by another club and has been outrighted by the Rockies to Triple-A Albuquerque, Patrick Lyons of JustBaseball.com reports.
Carreras was designated for assignment by the Rockies on Sunday, Luke Zahlmann of The Denver Gazette reports.
The Rockies optioned Carreras to Triple-A Albuquerque on Tuesday, Patrick Lyons of Just Baseball reports.
Carreras (undisclosed) has gone 5-for-20 with three runs and three RBI in five games since being reinstated from Double-A Hartford's 7-day injured list May 17.
Double-A Hartford placed Carreras on the 7-day injured list April 25 with an unspecified injury.