Dickerson missed 23 games while on the disabled list from May 19 to June 11 with the same injury. He was activated Thursday and went 2 for 12 in five games before aggravating the foot injury.
Miller, 28, was 1-3 with a 2.30 ERA in 21 minor league games. Miller appeared in eight games with Detroit in 2014.
The Rockies have a full 40-man roster.