Collmenter to bullpen; Webster joins rotation

Collmenter leaves 'em loaded 0:17 6/7/15: Josh Collmenter gets Jacob deGrom to pop up with the bases loaded to end a Mets threat in the 4th SAN FRANCISCO -- The D-backs will move Opening Day starter Josh Collmenter to the bullpen and replace him in the rotation with right-hander Allen Webster, who will start Saturday against the Giants. The corresponding roster move will be announced before the game.

Collmenter has been struggling of late. He has not won a game since May 6 and has a 7.76 ERA over that span.

D-backs manager Chip Hale explained the decision by saying that Collmenter has struggled with command and velocity of late and that a move to the bullpen might help him. Collmenter was a…