Hayes's stats from last year look awesome, but this year his efficiency has tanked. He's basically taking 4 more shots per game and making none of them, while also adding an extra turnover. Also, his steal + block numbers looked great his freshman year, but they regressed last year and haven't recovered. Without watching much Wisco I'm guessing that what happened is that he's been asked to take on a bigger responsibility to create offense and just hasn't thrived in that role. That's fine for a prospect in the late 1st, and Hayes could be a great versatile role player in the NBA.