The 49ers might start rookie wide receiver Michael Crabtree on Sunday against the Texans. Crabtree worked hard to learn the team's playbook and workout during the team's bye in Week 6. "I don't think that it's going to be too big for him," 49ers coach Mike Singletary told the San Jose Mercury News. "To me, even though he's come in late, he looks like he's ready." Crabtree, the 10th overall pick in April's NFL Draft, finally signed with San Francisco on Oct. 7.