Dickerson will play left and bat sixth against the Cincinnati Reds on Friday night.
Dickerson went on the 15-day on May 19 with plantar fasciitis in his left foot and returned June 11. He returned to the DL on June 17 with the same injury after playing five games.
He is batting .299 with five home runs in 55 games.
Brothers had a 6.75 ERA in three appearances since his recall July 10. He has struggled since going 2-1 with 19 saves and a 1.74 ERA in 72 games for Colorado in 2013.
The Rockies have 39 players on their 40-man roster.