Calm down man its no big deal. Do you realize that not only changing teams but leagues isnt that easy. He has to learn where to play defense for certain players and learn to gel with the players around him. He also has never played in the American League before. Terry Francona said it himself to give him a month and you'll see the real Renteria. Anything we are getting now is a plus from him.
The Card's had the best inside info on Edgar. If they felt his best days were behind him, why would they make him a similar offer? He'll be fine. It looks like most of the Sox offense is a little sluggish coming out of the gate.
Renteria is not a .330 hitter, that was a blip in the radar. But he is not a .270 hitter either. He is as advertised, a good hitter with the occasional pop, great D, and great speed. If you want a .300 average out of him, you may be waiting awhile, but he will give you consistent .290 30 doubles with slick D and 20-30 SBs, if he doestn do that I will be shocked, but as has been said, it is early. Lots of very good veterans have awful starts, it is in their blood, just look at the yankees....