Rom was recalled from Triple-A Norfolk by the Orioles on Tuesday.
It will be the first stint in the big leagues for Rom, who was added to the Orioles' 40-man roster over the offseason. The left-hander has been starting at Norfolk, posting a 2.87 ERA in six outings, but he'll be pegged for relief duty in Baltimore for now, per Roch Kubatko of MASNSports.com.