My major concern with KB is the shoulder injury is still affecting him. From what I remember reading, there are some shoulder injuries that can linger long term. The thought was that this wasn't the case with KB but the more he struggles, the more concerned I get. FWIW Rizzo and Zobrist have started out the season struggling just as bad as KB but no one is really talking about them. I think people get more worried about KB struggles because he's supposed to be this core's super duper duper star. If he's not, the lineup is still formidable but not game breaking like we all hoped when everyone was coming up, especially because Schwarber is not the player we were hoping and Russell is human waste. Contreras and the emergency of Javy into a star (which was starting to be in doubt after 2014) have mitigated this a bit, but the bottom line is that we need superstar KB.