I know this was suggested by Shawn a while back, but I wanted to bring it up again. Smoltz makes sense on a lot of levels, but mostly, because the Cubs wouldn't have to give him a multiyear deal. He could be insurance if Marmol can't close, he COULD he a starting rotation backup and he's a guy with a great deal of postseason experience (winning postseason experience, at that).
This is a TOTAL guess on my part, but couldn't Hendry convince the Rickets to free up an extra few million for a guy with Smoltz's resume? Frankly, I'd rather have Smoltz for one year at $3 million than Calero for two years and $4 million.