Third base remains the Cubs' biggest positional weak point. Matt Shaw has been better in recent weeks, but he's far from a reliable postseason weapon. Utilityman Willi Castro was a nice deadline add, but he's a pure depth piece — not the difference-maker Chicago so desperately needs at the hot corner.

Occasionally, MLB executives will acknowledge that a deal didn't go their way. Some moves just don't work out, and they can admit that. What you almost never see, though, is an executive publicly regret a deal less than a week after making it.