Arizona also recalled right-hander Allen Webster and utility player Jamie Romak from Reno, along with outfielder Socrates Brito from Double-A Mobile. Outfielder Peter O'Brien's contract was purchased from Reno and right-hander Evan Marshall was placed on the 60-day disabled list.
Chacin went 0-1 with a 2.70 ERA in two games with the Diamondbacks. Chafin appeared in 55 games, going 5-1 with a 2.41 ERA and Webster went 1-1 with a 5.88 ERA in six games.
Marshall has been on the disabled list since being hit in the head by a line drive on Aug. 4 while pitching for Reno. He underwent surgery to relieve brain pressure and recently began throwing again.