Chafin was optioned to Triple-A Reno on Friday.
With a 9.00 ERA and 1.77 WHIP in 23 appearances, the D-backs opted to replace Chafin in their bullpen with a series of moves prior to the start of their weekend series with the Padres. If he can turn things around at Reno, Chafin could be back in the fold with the D-backs in a few weeks.