The 27-year-old had been with the Indians since signing a minor league pact over the offseason, but he opted out of his deal and the team declined to add him to the major league roster. Chacin had worked to a 3.21 ERA over 42 frames at Triple-A on the year, striking out 5.4 and walking 3.2 batters per nine in that stretch.
Chacin has shown plenty of promise at times. In both 2011 and 2013 he put up over 190 innings of 3.62 and 3.47 ERA pitching, respectively, and was even better in his first full season in 2010 — all while pitching for the Rockies and spending half his time at Coors Field. But shoulder issues and struggles with command (along with a dwindling strikeout rate) have derailed his career.
The D’Backs certainly could use another arm in the rotation, which has lagged on the whole in both results and peripherals. If things work out, Arizona could conceivably elect to keep Chacin for next year by tendering him a contract through arbitration.