Can Baldwin be 49ers' deep threat?

It's become quite clear that San Francisco 49ers quarterback Colin Kaepernick has only two legit receiving threats: WR Anquan Boldin and TE Vernon Davis. Even they were relatively limited in Thursday evening's game, as Boldin had five catches for 90 yards and a score, while the dinged-up Davis had two catches for 18 yards and a score. You know the rest of the pass-catching corps was unimpressive, when fullback Bruce Miller was the second-best receiver with three receptions for 22 yards.