Thanks to snbts for working with me on this deal.
Rationale: V-Mart is obviously a productive player and will be very useful for the Marlins. The Tigers are looking to free up some salary for the next several seasons and get younger. Volstad will fill the 4th SP spot for the Tigers for this and several seasons at a very affordable price. His xFIP has me optimistic, as does his durability so far. I'm hoping that Wrigley field doesn't cause him to give up even more homers, though. Chad James has shown a great deal of promise and will hopefully be a major leaguer in 2013.
Marlins get better for this year and possibly beyond, while the Tigers get younger and free up some salary for free agency.