Milone (knee) was transferred to the 60-day disabled list Thursday, Michael Baron of SportsNet New York reports.
The 30-year-old went on the DL in late May with a sprained left knee and looks to have made little headway in his recovery. Milone's move to the 60-day DL opens a place on the 40-man roster for right-hander Chasen Bradford as the Mets continue their search for pitching options.