The D-backs exercised their 2016 club options on right-handers Brad Ziegler and Josh Collmenter on Tuesday.
Ziegler set career bests this season in saves (30) and WHIP (0.96), going 0-3 with a 1.85 ERA in 66 appearances. The 36-year-old is the all-time franchise leader in relief ERA (2.45) and appearances (312), and is one of three pitchers to appear in 60-plus games in each of the last six seasons.