The Red Sox placed Yoshida on the 10-day injured list Wednesday with a left thumb strain, Gabrielle Starr of the Boston Herald reports.
MRI results revealed a strain in Yoshida's left thumb after he jammed his hand during Sunday's game against the Cubs, and there is no telling whether or not the 30-year-old outfielder will be able to return when eligible May 10. The newly signed Dominic Smith will take Yoshida's place on the active roster.