Keegan cleared outright waivers and was assigned by the Orioles to Double-A Chesapeake on Saturday, Roch Kubatko of MASNSports.com reports.
Keegan will stick around with the Orioles after being claimed off waivers from the Rays in late June. He's spent the entire season in Triple-A but will move down to Double-A to start his tenure with the Orioles organization.