"I think we'd like to see Chafin throw another game just because we watched him in one game and he went back down to Triple-A and threw extremely well," D-backs manager Kirk Gibson said. "He had a good mix of pitches, threw them to both sides of the plate."
As it stands, the D-backs have six men in their rotation with Wade Miley, Josh Collmenter, Randall Delgado, Chase Anderson, Vidal Nuno and Trevor Cahill.
With Anderson having far surpassed his innings total from a year ago, it stands to reason that Chafin could end up starting in place of Anderson next time through the rotation.
This is also Ahmed's second stint in the big leagues this year, while Wilson was last in the big leagues with the Angels in 2012.
Steve Gilbert is a reporter for MLB.com. Read his blog, Inside the D-backs, and follow him on Twitter @SteveGilbertMLB. This story was not subject to the approval of Major League Baseball or its clubs.