As best I can tell, the Red Sox either traded Kotchman to save a little money (after all, with Beltre signing and Youk still on the team, Kotchman wasn't exactly going to be seeing much time in the field, why pay him almost $3M?), or because Theo was bored and needed something to do. I'm leaning towards the latter, but this one has 'bored' written all over it.
When asked who he got in return for Kotchman, Theo responded, "I'm not sure. To be honest, I wasn't really paying attention. I was kind of bored."
Then there was this press release from the Red Sox:
Having nothing better to do the Red Sox have traded Casey Kotchman to the Seattle Mariners for something or other. We're kind of sure that this might certainly be a possibly good trade, but we weren't really paying attention. Do any of you have a deck of cards?