Zastryzny (shoulder) will begin a rehab assignment with the Brewers' rookie-level Arizona Complex League affiliate Friday, Curt Hogg of the Milwaukee Journal Sentinel reports.
Shoulder and intercostal injuries have kept Zastryzny on the shelf all season, but he's ready to test things out in game action. The lefty reliever will eventually move up to a higher affiliate and could be ready to join the Brewers' bullpen around the All-Star break.