Alvarado (elbow) will throw a bullpen session Wednesday if Monday's flat-ground session goes well, Alex Coffey of The Philadelphia Inquirer reports.

EDGE Analysis

He'll need an addition bullpen session after that before progressing to facing hitters and eventually going out on a rehab assignment. It's not clear at this point how many rehab appearances Alvarado might require. He's trending in the right direction, but the fireballing reliever still has a ways to go.