They're talking about how hard it will be for us to retain Chol (and others) at the end of the season.
Personally, I'm at the stage where I don't think retaining Chol is something we should worry about. I've always liked the guy, but there's something just not right about the guy -- he either doesn't know when to go or doesn't want to when the time comes. Either way he just doesn't influence competitions the way a guy of his size should.
Chol is rubbish. We have put years of development into his game and he still cannot compete at an AFL level. A complete waste of our resources. We will be lucky to trade him for half a warm slab.