Juan was hired as run game coordinator. He was meddling in 2013. He is the one variable that made the run game putrid. He started pushing ZBS on a Caldwell offense that looked like it didn't need it.
No I just see where you can find a RB easily. Foster, Charles, Morris, and so many more undrafted or dratfed very low and they have been some of the best in the league.
The 2010 GB team ran with Brandon Jackson and 703 yds. NE with Kevin Faulk. The 96 Packers didn't have a steady running game. It isn't 100% needed. RB's can be had cheap and young and perform well.