Seems to be Tatum. But...
Some here predicted Jaylen's break out in Year Two. Not me. I thought he'd be a little better, and after SL I was sure that he'd take just a step rather than a leap (recall that after a big performance in game 1 of SL, Jaylen looked a lot like rookie Jaylen). What Jaylen's done has me stunned and giddy -- on both ends of the floor. Last year he couldn't dribble the lane without losing the handle or getting the ball knocked out. Still room for improvement there, but he's light year's ahead of rookie Jaylen. His shot has improved, passing has improved, rebounding has significantly improved. But most of all, his defense has leaped. Last year he was often in the wrong place and often beaten. This year he is emerging, and he looks like an elite defender in the making. I think he can be one of a few guys on this team capable of annoying the heck out of LBJ come playoffs. It is Jaylen's leap from Year One to Year Two that makes me wonder if he's got another leap in him. If so, he may challenge Jayson for top guy.
But Tatum comes into the league already special, and that's too rare to ignore.