According to Nick Wagoner, Brian Robinson Jr. was brought on to be the second back in San Francisco. This shouldn't come as a shock given how well Robinson performed during his days in Washington. 49ers' head coach Kyle Shanahan said they've had their eyes on Robinson for a while and are pumped to have him in San Francisco. The oft-injured Christian McCaffrey is going to lead the way, but Robinson appears to be second on the pecking order. That means, Isaac Guerendo (shoulder) will fall to ...