The Orioles claimed Roa off waivers from the Twins on Sunday and optioned him to Triple-A Norfolk, Jake Rill of MLB.com reports.
Roa was designated for assignment by Minnesota on Wednesday but will remain on a 40-man roster as he heads to Baltimore. Prior to his brief time in the Twins organization, the right-hander made seven appearances for the Astros earlier this season and surrendered five earned runs with a 6:7 K:BB over 8.2 innings.