According to an industry source, the Red Sox are exploring multiple options regarding an upgrade on the left side of their infield, including calling teams regarding possible trades. The Red Sox currently have recently-recalled Brock Holt starting at third base, with Will Middlebrooks on the 15-day disabled list with a fractured index finger on his right hand. While the Red Sox haven’t engaged in talks with agent Scott Boras about free agent Stephen Drew, the shortstop could represent an intriguing possibility if no other solution is uncovered. Some in baseball believe Boras might be waiting until after the Major League Baseball amateur draft (which ends June 7) to make a move with his client, who could sign with any team without costing draft pick compensation following the draft. 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. When asked about Drew on the Bradfo Show podcast (to be aired Monday), Red Sox general manager Ben Cherington said, “I think what I’ve said before I would say again, we have to evaluate every situation based on the information we have at that time. If information changes then our position may evolve and change along with it. That doesn’t mean we get every decision right, of course we don’t. But every decision we make, every position we take, is based on the information we have at that time. That’s led us to where we are now.