The Orioles optioned McDermott to Triple-A Norfolk on Tuesday, Roch Kubatko of MASNSports.com reports.
McDermott has impressed the Orioles this spring as he makes a full-time move to the bullpen, but he will continue working on things at Norfolk at the beginning of the season. The 27-year-old has a 6:1 K:BB in three innings during Grapefruit League play but has also served up three solo home runs.