If two months of Ryan Dempster brings back a Top 50 prospect* (as rumored) and two months of Anibal Sanchez brings back a Top 25 prospect** (as reported), what can the Red Sox offer to upgrade the starting rotation?

On the flip side, what could the Red Sox expect in return for a Jon Lester or a Josh Beckett?

* righthander Randall Delgado was ranked No. 46 in Baseball America's preseason rankings before losing his prospect status: https://twitter.com/keithlaw/status/227474908375027712

** righthander Jacob Turner entered this season as Baseball America's No. 22 prospect: https://twitter.com/jonmorosi/status/227518097274322944