They seem to really like Whit but he makes the most money and maybe after the good finish to the year they can get more for him than they gave up? But again, they seem to like him a lot. Biggio, on the other hand, they clearly do not. I kid about him a lot but he was buried on the depth chart all year and couldn't even beat out Tapia for playing time. Granted, the entire industry might be pretty down on Biggio so they might not get anything for him via trade but it seems like he's clearly the low man on the totem pole and obvious trade bait so I would think he is most likely to go.
I actually think trading Espinal makes a lot of sense as he would likely bring back the most value. Whit could start the year as the primary 2B with the expectation that Barger will be up some time during the year.