Triple-A Norfolk outfielder Corey Patterson is expected to leave Syracuse, N.Y. on Wednesday for Baltimore, a source told the Sun.
It's possible he won't be activated by the Orioles until Thursday, when the club faces a right-handed starter for the first time in their three-game series with the Seattle Mariners at Camden Yards.
Patterson, 30, who played with the Orioles in 2006 and 2007, batted .368 in 14 games with the Tides. He joined Norfolk in late April after he failed to make the Seattle Mariners out of spring training.
Patterson's Tides are in Syracuse to play the Chiefs, the Washington Nationals' Triple-A affiliate.
No word on a corresponding move, but outfielders Nolan Reimold and Lou Montanez are the most likely candidates to be demoted.