Altavilla cleared waivers Saturday and was sent outright to Triple-A Omaha.
The Royals dropped Altavilla from their 40-man roster immediately upon activating him from the 60-day IL on Thursday, but he'll remain within the organization after passing through waivers unclaimed. The 31-year-old righty has allowed six runs in only 3.2 major-league innings this season, though he's been more effective in Triple-A, pitching to the tune of a 4.11 ERA through 35 frames.