Corbin (elbow) will begin a rehab assignment with High-A Visalia on Monday, Jake Rill of MLB.com reports. Corbin continues working his way back from the Tommy John surgery he underwent in march of 2014, and will take another step forward in a rehab start Monday. His fastball reportedly sits around 94 MPH according to manager Chip Hale, and if no setbacks occur as he builds arm strength, a late June or early July return seems plausible.