Atlanta acquired Hearn from the Rangers on Monday in exchange for cash considerations, David O'Brien of The Athletic reports.
Hearn holds a 5.11 ERA over 92 appearances -- 25 starts -- at the major-league level, although he's spent most of 2023 at Triple-A Round Rock. He has minor-league options remaining, but he looks set to report to the big-league club right away as he joins a new organization.