 On November 20, 2008, O'Flaherty was claimed off waivers by the Atlanta Braves.On April 7, 2009 O'Flaherty made his Braves debut, pitching 1 and 1/3 scoreless innings and allowing one hit.He spent the entire 2009 season on the active roster and finished the year with a 3.04 ERA, a 1.243 WHIP, and a 39-to-18 strikeout-to-walk ratio in 56 and 1/3 innings.