The D - backs ' bullpen was an Achilles ' heel last year .
It did n't help when the club dealt veteran back - end pitchers Brad Ziegler and Tyler Clippard prior to the Trade Deadline .
The D - backs ' bullpen was an Achilles ' heel last year , and it did n't help when the club dealt veteran back - end pitchers Brad Ziegler and Tyler Clippard prior to the Trade Deadline .