It is when your stated goal is to acquire assets. In trades you relinquish assets, and presumably your younger, more valuable to the long-term stability of the franchise ones, at that. Correct. I we want to acquire someone like Danks, Shields, Gio, etc. it will be very costly, and yes it improves the current team, but you've weakened the farm system.You can then hit the international FA market and draft more guys, but then you're back to the craps table. Baseballs most successful teams in recent years have been the Yankees, Red Sox, Philies, and Rangers who have built with the combination of free agents, trades and the farm system.