Aguiar (undisclosed) was activated from the 7-day injured list Thursday.
Aguiar landed on the shelf in April due to an unspecified injury, but he's managed to put the issue behind him and has returned to Triple-A Louisville after making three rehab appearances in May. The right-hander looked comfortable in his first outing with Louisville since April 8, allowing two hits and one walk while striking out four over four scoreless frames Friday against Triple-A Memphis.