Alexander will start at third base and bat eighth in Tuesday's game against the White Sox.
The 27-year-old has been used in a super utility role for the bulk of this season, but Alexander could be settling in as the Orioles' primary third baseman against righties over Coby Mayo. Alexander has garnered five of the past six starts at third base for the Orioles, and 13 of his last 14 starts have come at the hot corner.