The signing of 35-year old catcher David Ross to a 2-year deal was a clear signal that one of the current Red Sox backstops—Saltalamacchia or Lavarnway—was headed out of town in a trade. The speculation that Jarrod Saltalamacchia will move up 90 feet to be the new first baseman is just silly. Which of the two catchers is better trade bait? The Globe's Peter Abraham seems to think Salty is the better trade chip—along with a few prospects. We agree. While there are a number of teams who need a player to don the 'tools of ignorance', the Cubbies make the most sense as a trade partner. Not only is Theo enamoured with Salty, he's been shopping Matt Garza for a while—a guy the Sox would love to slide into their rotation for 2013. A match made in heaven, right? Well, considering the records of the two teams, maybe more like a match made in purgatory.