Crabtree saga, Mangini and Tennessee's D 

September, 27, 2009

Let's start with the obvious. San Francisco no longer can trade Michael Crabtree this season. Not even after it signs him, if it can.

The collective bargaining agreement clearly says if a player has not signed 30 days before the season -- which in this case would have been Aug. 14 -- his team is forbidden from trading him in that league year.

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