Probably harsh, but Tatum. The expectations were sky-high, and upon reflection probably unrealistic, after that playoff run. And he failed to meet them by a considerable margin.
I was never too high on Rozier, but he still dropped the ball completely.
Brown had a really solid final 50 games + playoffs, so I wasn't too upset about how he started the season. He was also dealing with that nagging hand injury.
So yeah, Tatum. Only because I know how good he can be