San Francisco wide receiver Isaac Bruce doesn't think it'll take long for rookie Michael Crabtree to learn the team's offense. "It shouldn't take long," Bruce told the San Francisco Chronicle. "He seems like a bright guy." The 49ers signed Crabtree to a $32 million contract on Wednesday. "It's going to be a process. Hopefully, after the bye, Mike will be ready go to. It will be a small role at first. It's going to be a work in progress. We will find ways to get him on the field," coach Mike Singletary said.