Leyland just made this announcement on the tigers Live post game show. He took no questions about the situation he said his reasoning is it gives us a better team.

My Translation: carlos is going to get him self killed at 1st. He's always in the baseline getting run over he plays 1st like a shortsop going after every ball instead of staying close to the bag. Miguel seems to be better suited for first then carlos.

maybe there is a double meaning after thinking about this it is much easier for Miguel to be an All star at 1st then to beat A-rod out at third.