Kendrick had been on the DL since Aug. 1 with right shoulder fatigue. He owns a 6.43 ERA and has allowed 26 home runs in 21 starts for the Rockies this season.
Logan was placed on the DL on Aug. 14, retroactive to Aug. 12, with left elbow inflammation. He has a 4.75 ERA this season, having struck out 38 and walked 16.
Logan should provide a boost to the Rockies' bullpen alongside Brothers and Castro, who will be making his first appearance with Colorado after being acquired from Toronto in the blockbuster trade involving shortstop Troy Tulowitzki.