Davies (back) is scheduled to return from the 15-day injured list to start Saturday at home against the Reds, Theo Mackie of The Arizona Republic reports.
Davies got the go-ahead Tuesday after throwing 87 pitches over six innings in his third and final minor-league rehab outing Sunday with Triple-A Reno. The 30-year-old right-hander has been on the injured list since July 19 due to lower-back inflammation. He's posted a rough 7.38 ERA and 1.62 WHIP across 12 major-league starts this season.