Left-handed reliever Everett Teaford is being recalled from Triple-A Omaha to take Davies' spot on the 25-man roster for Tuesday night's game against Baltimore.
Davies was scratched from his scheduled start on Sunday at Cleveland, prompting manager Ned Yost to return to a five-man rotation after using six starters for the last month.
In 13 starts this season, Davies was 1-9 with a 6.75 ERA. He missed 6 1/2 weeks earlier this year because of shoulder inflammation.
Teaford had one save and a 2.25 ERA in 17 relief appearances this season for the Royals. In 16 games for Omaha, he was 3-2 with a 3.34 ERA.
Dick Kaegel is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.