It has nothing to do with Koronka. It's that we have six middle infielders on the active roster and something has to give. And it better not be Walker. It was Theriot if not Bynum so the overall 25 man roster mix does not change much. I don't believe there's any need to have another middle infielder in the system, including as backup for the big league team. And Theriot was only going to be on the team until they added another pitcher (most likely when Wood was going to be actived). There wouldn't be a need to carry Bynum, Neifi, and Hairston throughout the season. If nobody else gets moved, this doesn't make much sense to me. Bynum was added to the 40-man on Cubs.com. Does anyone remember Hairston being listed as an outfielder before? Yes, when I looked at the list last week Hairston was listed as an OF.