Buchter was released by the Diamondbacks on Friday.
Buchter produced an ERA below 3.00 for four straight seasons from 2016 through 2019, but he's struggled to a 6.04 ERA and a 17.8 percent walk rate in a small sample of 22.1 innings at the highest level over the last two years. The 34-year-old owns a 3.38 ERA in 16 innings for Triple-A Reno this season, but his lack of recent major-league success may make it tough for him to find a new deal.