|Jose Morales is likely|
to be the No. 2 catcher
for the Colorado Rockies
This trade probably wasn't so much about adding Bargas as it was clearing Morales off the 40-man roster. He's out of options, and presumably the Twins prefer Drew Butera's defensive chops to Morales' batting average. The Twins chose to move Morales now rather than wait to see if either Butera or Joe Mauer gets hurt during spring training.
At this moment, the Twins have 37 men on the 40-man roster. Nishioka will make it 38. If, as I increasingly believe will happen, the Twins re-sign Carl Pavano, that will be 39.
Which would still leave a slot open. I therefore suspect that there is a signing somewhere in the Twins near future beyond Nishioka and Pavano. Therein would lie the advantage in moving Morales in December rather than waiting until closer to the season.