The Boston Red Sox are exploring multiple options to upgrade the left side of their infield, including making calls on possible trades, according to a source.

They currently have Brock Holt at third base with Will Middlebrooks on the disabled list with a fractured index finger on his right hand.

The Red Sox are currently 25th in the majors for OPS at the third base position (.592), totaling a .200 batting average at the position.