Instead of getting prospects, rumor is that Mini Me wants to dump Corbin's contract in exchange for the other team getting Finnegan and another bullpen arm. That's not what a rebuilding team would do.
interesting. I don't think Finnegan and Harvey together would make Corbin's contract acceptable for another team. That said, I've also heard, second-hand, that they are exploring Corbin deals from someone who I think might know.
Even after last night, I'd be surprised if anyone moved for Corbin rather than Williams. They have comparable defense-independent numbers for the year, with Williams having the lower ERA by a run. Even if drop Corbin's first two starts, his numbers aren't better than Williams. Corbin gives you about a half an inning per start more than Williams. Neither are good, but Williiams K%-BB% is better than Corbin's too. They both are homer prone but Williams gives up a few more flies so more chances.
The only argument for a team being more interested in Corbin than Williams is he's started deeper into the season recently than Williams, so if you are looking for a back end starter, then he's more likely to be taking turns and giving you innings in August and September. Like I said, short of tossing in Finnegan, Hassell, and another reliever, I can't imagine a team preferring that contract.