Was reading an article about players off seasons and I saw this bit about Jaylen's training.
SI: And you also have a guy like Jaylen Brown, who’s never played a game. What do you end up working on with him?
Johnson: For a kid like Jaylen, it's footwork. Balance. His ability to play off the catch. His ability to get into an attack position and score efficiently off of one and two dribbles. You don't get a bunch of dribbles in the NBA. I also feel like Jaylen has an opportunity to be able to have a deadly mid-post game. Like other big guards—right now Jimmy is really deadly on his mid-post game.
SI: But the footwork is step one.
Johnson: Exactly. We're not trying to get good at everything. We're focused on a couple things, and footwork is the basic that I'm really focused on. That applies in the post, the mid-post, pick-and-roll, the shooting. Once you've got footwork and balance, and ball-handling, you can get anywhere on the floor.
SI: But what about his role on the Celtics? How do you guys plan for something that hasn't happened yet?
Johnson: We break it down. Boston, I don't want to put it all out there, but you know they they drive in the slots. They're a hard slot-driving team. We need him comfortable in the pick-and-roll, whether it's side pick-and-roll, angle pick-and-roll, or slot pick-and-roll. We need him making corner threes. We take the concepts of what Boston already has in place, and I build that into Jaylen's sessions. So by the time he gets to training camp, he's very familiar with not only the positions that they're going to put him in, but he's got moves and counters that will make him more comfortable as an offensive player.
SI: How much are you talking to the Celtics through this process?
Johnson: They came out and spent a whole week with Jaylen and I. And we worked together on his development. [Teams] all come out. Now, that doesn't happen for a guy who's just trying to make a roster. That happens for the elite guys. They'll give you whatever you need to make sure that player is ready.
SI: Were you in touch with Brad Stevens?
Johnson: I've spoken to everybody around Brad, but I haven't seen Brad yet. But me and Jaylen discuss what Brad's told him. And the other coaches came out, so we saw them.
Entire Article is here
http://www.si.com/nba/2016/09/08/jimmy-butler-jaylen-brown-chris-johnson-bulls-celtics-nba-offseason