Feliz (arm) will begin a rehab assignment with Triple-A Round Rock on Saturday, Evan Grant of the Dallas Morning News reports. Feliz is scheduled to throw one inning Saturday, and while it's uncertain how many rehab appearances he'll need, the right-hander appears on track to return sometime next week. Shawn Tolleson has converted all six of his save chances since taking over the closer role for Texas, so look for Feliz to assume a middle-relief role upon activation.