Black recently received an injection in his neck for the injury.
To replace Black on the roster, the Mets activated Daisuke Matsuzaka from the DL.
Black told reporters Wednesday night that he is suffering from a herniated disk, which will likely keep him sidelined for a few more days.
"The doctor didn't seem too concerned," Black said (ESPN, Aug. 28). "It shouldn't be a big deal."
Terry Collins recently said the Mets could look to use Matsuzaka in the rotation, in an effort to get Zack Wheeler and Jacob deGrom extra rest after September 1 (Star-Ledger, Aug. 26).