I don't like this trade for the Cardinals. Brett Wallace is one of the best pure hitting prospects in the game right now. He could have been their starter at third base for the next five years and he would have been cost-controlled. I don't like trading a player with that much upside for a rental. Holliday, a Scott Boras client, will most certainly test the free agent waters at the conclusion of the season. Moreover, Holliday's just not that great a hitter away from Coors Field, having a sub .800 OPS away from there. He may improve their lineup for the rest of the season, but I don't like the long-term implications of this deal for the Cards. It's an awful lot to give up for a player that is not guaranteed to make the Cardinals any better than the third best team in the NL.