There is a very real possibility that Michael Crabtree will sit out the entire 2009 season. Sitting out the entire season would allow him to re-enter the 2010 NFL Draft. A number of sources confirmed to ESPN's Adam Schefter that Crabtree will not sign with San Francisco. The 49ers would love to have Crabtree, but the organization doesn't see a way that they'll be able to make that happen.