Davies was a starting pitcher for the Atlanta Braves. He is part of the group of rookie players nicknamed the "Baby Braves" that Atlanta called up from its minor league system during the 2005 season. Davies made his Major League debut on May 21, 2005 a rainy night at Fenway Park in Boston and dominated six innings against the Red Sox. Braves pitchers John Thomson and Mike Hampton were both put on the disabled list with injuries, and Davies was called up. Davies immediately made an impact, as he did not allow a run in his first three starts in the Major Leagues. When Thomson and Hampton returned to the pitching rotation in August, Davies was sent back to the minor leagues.