"It's another piece," said White Sox manager Robin Ventura of Sierra. "With [Adam] Eaton going down, we're light in the outfield area. You can have Leury go out there, but it adds another piece to us, and being right-handed keeps us more balanced that way."
The right-handed hitting and throwing Sierra, 25, was claimed off waivers from the Blue Jays on Saturday. He has played 69 career games in right and three in left, but has never played center field.
Scott Merkin is a reporter for MLB.com. Read his blog, Merk's Works, and follow him on Twitter @scottmerkin. This story was not subject to the approval of Major League Baseball or its clubs.