A Regrettable Trade

The other day I tweeted this:

Wow, that young Wil Myers can hit! Wonder if a team like KC could pry him away with a veteran pitcher like Shields. Oh. Wait.

— Joe Posnanski (@JPosnanski) July 25, 2013

It was just a wise-guy tweet, I know. “Too soon,” many people wrote back. But somewhere inside there, maybe, there was a point worth making. Before the season…