Zobrist makes way too much sense. I think the Cubs are more apt to go rental with a hitter, so as to keep spots open for all the young players. But Zobrist could allow the Cubs to bench Castro (moving Russell to SS), bench Russell who's also struggling, provide a platoon for Fowler (though, he's also better vs LHPs). He can/has hit anywhere in the lineup. Play multiple positions. Switch hit. Played for Maddon. Has a 1.004 OPS in high leverage situations this year. Hell, I'd even give him a 2-3 year extension if they traded for him, even at his age.