The Diamondbacks have non-tendered right-handed reliever Brad Boxberger, according to a team announcement on Friday. Boxberger will enter the free agent pool as one of just a handful of closers available this winter.
The 30-year-old righty was initially picked up by the D-backs during a trade for right-handed pitching prospect Curtis Taylor last November and was elected the team closer at the start of the 2018 season. He finished his run in Arizona with a 4.39 ERA and 32 saves across 60 appearances, complemented by a 5.4 BB/9 ad 12.0 SO/9 through 53 1/3 innings. He saw his stock plummet toward the end of the season, however, and was temporarily booted from the closer role after a handful of shaky relief appearances in September, during which he scattered six runs, three walks, and a single strikeout over two innings.
The Diamondbacks also declined to tender a contract to right-hander Shelby Miller, who was sidelined for the majority of the season while battling from lingering elbow issues, as well as infielder/outfielder Chris Owings, who batted just above the Mendoza Line with a .206/.272/.302 batting line, four homers, and a near career-worst -0.8 fWAR in 2018.