Zach is a heady, smart player. He understands his body I think better than anybody else. So I'm going to give him the tools and help teach him, but he's a really smart player. He does things that just come naturally to him. I'd like to take credit but I don't think it's me.

The Green Bay Packers made a couple of notable free agent signings this offseason, landing offensive guard Aaron Banks, cornerback Nate Hobbs, wide receiver Mecole Hardman, and linebacker Isaiah Simmons.

Durability is always a concern, the cliff can come faster than for players at other positions, and there's the ongoing discussion about value and impact—ultimately, a question about how running backs truly make the running game and the offense in general better,