Reds manager David Bell said Friday that McLain (shoulder) recently suffered a stress reaction in his rib cage, Charlie Goldsmith of The Cincinnati Enquirer reports.
McLain had been hoping to begin a rehab assignment Aug. 12 and Bell added Friday that it's possible that happens. The young infielder has been working his way back from left shoulder surgery, which he had back in late March. McLain is hoping to rejoin the Reds at some point before the end of the season.