Collmenter was 4-6 with a 3.79 ERA in 44 games (12 starts) this season, ranking sixth among NL relievers with a 1.89 ERA. The 29-year-old is 35-33 with a 3.49 ERA in five seasons with Arizona.
Cash Kruth is a reporter for MLB.com. Follow him on Twitter at @cashkruth. This story was not subject to the approval of Major League Baseball or its clubs.