Jennings (concussion) is expected rejoin the Marlins when rosters expand on Sept. 1, the Miami Herald reports.
Analysis:
Jennings sustained a concussion on Aug. 7 after taking a line drive to the head, but he's made solid progress in the meantime, appearing in four games for High-A Jupiter during his rehab. He holds a sparkling 1.03 ERA in 35 innings pitched this season for the Marlins.
