Fernandez (back) is on track to begin a rehab assignment with Triple-A Memphis on Friday, Jeff Jones of the Belleville News-Democrat reports.
Fernandez has thrown one successful bullpen session since going down with lower-back pain in early June, and he will throw off the mound again Wednesday. As long as that goes well, Fernandez would be cleared for a rehab assignment. Because his absence has been brief, Fernandez shouldn't require many rehab appearances before being reinstated.