Parmelee was placed on the 7-day DL on Thursday after experiencing back spasms, the Scranton Times-Tribune reports.
Parmelee had recently been activated off the DL after missing two months with a hamstring issue, but he was forced to leave Wednesday's contest with discomfort in his back and it will now sideline him for at least a week. The first baseman had been hitting just .200 since being sent to the Triple-A club, and with the Yankees seeming committed to giving younger players chances, Parmelee may not have returned to the big leagues this year even if healthy.