The Diamondbacks have designated righty Matt Buschmann for assignment, per a club announcement. His roster spot was needed for southpaw Edwin Escobar, who was just claimed off waivers.
Buschmann, 32, had already been optioned back to Triple-A after making his MLB debut earlier in the year. He threw well in three appearances, allowing only one earned run on three hits and an intentional walk over 4 1/3 innings while retiring three via the strikeout.
The Triple-A level represents familiar territory for the minor league veteran. Buschmann has racked up 598 1/3 frames there over parts of eight seasons, most of them as a starter, working to a 5.08 ERA with 7.3 K/9 against 3.6 BB/9.