From the official site:
LHP Eduardo Rodriguez (personal)
Expected return: Possibly week of Aug. 15
Rodriguez is scheduled to throw four innings or 70-75 pitches on Thursday in his first of two or three rehab starts for Triple-A Toledo. He tossed three innings of one-run ball on three hits with five strikeouts Saturday in a rehab start for Single-A Lakeland. (Last updated: Aug. 9)
"He’s (Rogers) getting closer to a rehab assignment sometime in August, according to manager A.J. Hinch, and will likely be a candidate for return as a third catcher once rosters expand to 28 players in September. "