Cain shouldn't be included in the surprises. He's been a hoss all along and a GP favorite.
Porter has been the biggest surprise to me.
Cain and his talent are no surprise, but losing Tanner Brock for the year certainly is a surprise (to me anyway). The starting LB position belongs to Kenny now and he is taking advantage of his opportunity. Plays faster every week. I predict he has a huge game this week against Zach Line and company.