Matz (back) will begin a rehab assignment Thursday and is expected to throw about 30 pitches over two innings, Lynn Worthy of the St. Louis Post-Dispatch reports.

EDGE Analysis

The left-hander is hoping to return from the injured list sometime in August, and beginning a rehab assignment at the start of the month should give him a chance to make that happen. Matz has been sidelined since late April and will likely need a least a few rehab starts before rejoining the Cardinals.