49ers coach Mike Singletary said Monday that the team has discussed changing their offer to Michael Crabtree. Singletary wasn't sure if the team had formally reached out to the receiver, who they took with the 10th overall pick and remains unsigned. San Francisco's current offer is believed to be a five-year deal worth $20 million, including $16 million in guarantees. Crabtree is reportedly prepared to sit out the 2009 season so that he can re-enter the 2010 NFL Draft.