Lowther (shoulder) will make a rehab start at High-A Aberdeen on Saturday, Roch Kubatko of MASNSports.com reports.
Lowther made his first rehab appearance in the Florida Complex League and allowed a hit and no walks while striking out three in 2.1 innings. The southpaw is slated to make only one rehab start at High-A Aberdeen before he progresses to Double-A Bowie next week. If he feels good following each appearance, the 25-year-old is expected to return to Triple-A Norfolk afterward.