I take this quote by Staley as basically the Lions wanted him to toughen up.
"So this offseason, Staley gave Swift a challenge:
“Hey man, you’ve got to fight through some things.”
The objective is clear. Staley needs Swift to stay as healthy as possible, but he can’t back down when the relatively minor bumps and bruises come.
“We all know there’s a difference in being injured and hurt,” Staley explained. “As soon as you step in this building as a running back—Day 1 of training camp—you’re not going to feel the same. So there are going to be some things he’s going to have to fight through, and he’s going to have to work through that.”