No one's saying Wells is great. However, considering how much he makes, how much Garza makes, and their respective levels of production, some feel that it just doesn't make much sense to trade him for Garza, who might be a slight upgrade for about 10x the price. I'd rather spend a little money than what limited talent the Cubs have in the system. Sometime very soon the Cubs are going to have to get an impact player, somewhere. It won't be through the system. And it probably won't be via free agency So trade bait should be stockpiled for that purpose, not spent for second and third tier players.