too lazy to look, but if Candelario's splits hitting LH were not great, Harris has gone on record as saying he wants to find a LH bat for our infield. If you believe that Tork, Schoop and Baez are relatively set, then 3B is where you address that.
Of course, I think Schoop could easily slide over to 3B. I believe he's played there before, has a very strong and acccurate arm and with the new rule outlawing the shift, his mobility (or lack of) might be better suited at 3B. Of course, he could also become a super-sub, too.