The Red Sox placed Smith (forearm) on the disabled list Friday, Evan Drellich of the Boston Herald reports.
It was reported earlier this week that Smith was dealing with forearm soreness, and his placement on the disabled list signals that he did not make much progress over the last few days. The extent of his setback has not yet been determined, but he will be eligible to be activated May 30. Noe Ramirez was recalled to take Smith's place on the roster.