Is Davis just all mental? Like how does he go from dominant to invisible every other game
I don't think they involve him enough in the offense.
One part of his game that has bothered me throughout his NBA career is that he has not made passing a major part of his arsenal. He was a better passer in Kentucky than he was in New Orleans. In New Orleans they kept asking him to score. He went away from the offensive facilitator he was in Kentucky.
Being a passer and high post facilitator allows you to impact the game more on offense. It makes you more of a threat because the opposing team has to worry about you every time you touch the ball because you are a threat to score. So the defense reacts strongly to you. This can be used to unbalance a defense. And AD has good guard skills with his handles and his passing. It is not like he can't do it.
I would love to see LAL use AD more as a high post facilitator and do a lot more in terms of dribble hand offs and off ball cutting. It would make their offense much more dynamic. Less reliant on one-on-one play. Use AD more like SAC uses Sabonis in the high post.
This too helps Davis because he touches the ball more. His passing allows him to help the team even when not scoring. And he'll get a few more scoring opportunities just out of touching it more often.
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In addition (to the not involving AD enough), LAL got three ball happy shot happy perimeter players in LeBron, D Russell, Schroder and A Reaves. Those guys take up a lot of touches and a lot of time on the ball. It is hard to get AD the touches he warrants even in his current role because he has to compete with all those guys for shots. And then you have Hachimura who is a black-hole. He doesn't even understand what pass is.
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The other big hold back for AD's consistency is that his midrange jump-shot and outside shooting have seemed to abandoned him. His shooting has been so inconsistent since the Bubble 3 years ago. It is amazing how up and down his shooting is. When his shot isn't there, he loses a chunk of scoring. He becomes a paint only scorer for the most part. That makes him less consistent as well.