Boldin’s good work adds to Davis puzzle
Here is my Thursday column on the 49ers’ offense, sans Michael Crabtree. SANTA CLARA –Without Michael Crabtree, the focal point of the San Francisco 49ers’ passing attack last season, the 49ers need all of their receivers to step up – Anquan Boldin, Vernon Davis, A.J. Jenkins and anyone else who can run and catch and breathe. At an afternoon OTA session this week, Boldin stepped up. He was unstoppable. He…