Maeda (thigh) is expected to throw "an aggressive bullpen" session either Tuesday or Wednesday, Bill Plunkett of The Orange County Register reports.
Maeda was sent to the 10-day injured list Friday due to a left adductor contusion, though he's only expected to miss one turn through the rotation. If his side session goes well, the right-hander should return from the shelf in time to make a start May 26 against Pittsburgh.