In an effort to improve their defense, the Boston Red Sox are moving Enrique Hernandez from the starting shortstop role.

They are also moving Triston Casas from the starting role at first base.

Hernandez will split his time between second base and center field, while Justin Turner will man first base. 

"We need to be better on defense," Alex Cora said.

Hernandez leads baseball with 14 errors this season.