As Dave mentioned earlier, the Mariners have signed Dave Hansen to a minor league contract. Presumably, he'll be up to help the bench before long - Dave says he'll take Choo's place on the roster. Once Hansen is activated, it looks like Pokey Reese will be transferred to the 60-day DL.
You'll remember Hansen as one of the few bright spots from 2004, a guy who pinch-hit and spot-started his way to a .835 OPS in limited time. We can expect him to do what he's always done, providing a close approximation of the twilight of John Olerud's career for a low price. As a left-handed bench bat, you could do a lot worse, and the Mariners have.