Atlanta acquired Uberstine from Boston on Monday in exchange for outfielder Eli White, Mark Feinsand of MLB.com reports.
The 27-year-old made his MLB debut in a 2.2-inning relief appearance with the Red Sox on April 5 but has otherwise spent the entire season in the minors. Over 32 innings at Triple-A Worcester, the right-hander posted a 2.81 ERA, 1.00 WHIP and 37:11 K:BB. He'll likely join the bullpen at Triple-A Gwinnett as he moves on to a new organization.