1. I would drop Dreifort for Contreras. Dreifort is out for at least 10 days with an arthritic knee, and there has been suggestions it could be career ending. Politte is not a great closer and gives up too many homers but he still pitches for a team that will be .500+ and will give you 30 saves likely. Myers looks like he'd be the real deal so I'd hang onto him.
2. It's hard to tell what they'll do with the Rangers lineup, but I'd imagine they will use some kind of platoon arrangement to get everyone some playing time. Teixera will probably lose the most playing time, and I'd think he will only be the 3B against lefties, while Blalock is the 3B against righties, and they leave Palmiero at 1B and Everett in the OF.