Sceroler cleared waivers and was returned to the Reds on Saturday, Roch Kubatko of MASNSports.com reports.
Sceroler was designated for assignment by the Orioles on Tuesday.
Sceroler allowed six runs on five hits and a walk with two strikeouts in two innings in a 14-1 loss to the Mets on Wednesday.
Sceroler (shoulder) was activated off the 10-day injured list Tuesday.
Sceroler (shoulder) began a rehab assignment with Triple-A Norfolk on Thursday, Rich Dubroff of BaltimoreBaseball.com reports.
Sceroler (shoulder) recently threw a side session and is nearing his return from the injured list, Joe Trezza of MLB.com reports.
Sceroler (shoulder) hasn't yet resumed throwing, Roch Kubatko of MASNSports.com reports.
Orioles manager Brandon Hyde said Thursday that he's encouraged by Sceroler's (shoulder) test results so far, Roch Kubatko of MASNSports.com reports.
Sceroler was placed on the 10-day injured list due to right shoulder tendinitis, retroactive to April 13.
Sceroler will make the Orioles' Opening Day roster, Nathan Ruiz of The Baltimore Sun reports.