It didn't sound like he was injured, but more that they found something that needed cleaning up. Slight difference .
That being said, his durability is certainly I question.
I doubt we really know the full story nor ever will. Frost is not at all open about injury issues.
I'm sure we'll see Stepp some, but I'm skeptical we are getting anywhere near a guy who can carry the ball 15-20 times per game for a full season -- if that's what some are hoping for.