Siani was recalled from Triple-A Norfolk on Saturday, Rich Dubroff of BaltimoreBaseball.com reports.
The 26-year-old outfielder was claimed off waivers from the Dodgers last month and will now get his first opportunity with the Orioles, replacing Adley Rutschman (concussion) on the active roster. Siani has struggled to a .425 OPS in his time with Norfolk this season (15 games) and will likely fill a bench role while up with Baltimore.