Josh Collmenter is the most likely candidate to start for the Diamondbacks on June 18. The D'Backs demoted Tyler Skaggs on Monday, but because of an off day Thursday, they won't need a fifth starter until next Tuesday. In addition to Collmenter, Charles Brewer and Randall Delgado will also receive consideration. Collmenter boasts a 3.03 ERA and 1.16 WHIP with a strikeout per inning out of the bullpen this season.