Arano was designated for assignment by Atlanta on Friday.
The 26-year-old had a two-day stint in the majors in May without seeing game action, and he's now lost his spot on the 40-man roster. Arano last saw extended run in the big leagues with the Phillies in 2018 and posted a 2.73 ERA, 1.20 WHIP and 60:17 K:BB over 59.1 innings, but he's pitched in only three games over the past two seasons.