Double-A Harrisburg activated Millas (intercostal strain) from its 7-day injured list Tuesday, Jesse Dougherty of The Washington Post reports.
Millas looks ready to make his debut at Harrisburg after the intercostal injury resulted in him opening the season on the IL. The 24-year-old checked out healthy after a recent 13-game rehab assignment at Single-A Fredericksburg, where he slashed .239/.386/.348 over 57 plate appearances.