Chafin was placed on the 15-day DL on Wednesday with left shoulder tendinitis.
Chafin will hit the DL to recover from his shoulder injury while the Diamondbacks bring up relievers Dominic Leone and Zac Curtis to bolster the bullpen. The 26-year-old has been awful through 32 relief appearances this season, putting up a 6.75 ERA and 1.46 WHIP.