During the Los Angeles Lakers dismantling of the Golden State Warriors on Saturday at the Chase Center in San Francisco, fans caught a moment between head coach J.J. Redick and superstar Luka Doncic.   Doncic — the franchise’s newest crown jewel — was walking towards the Lakers bench when Redick reached out and grabbed his arm. Not violently, but firmly enough that it got Doncic’s attention.  The two exchanged words along the sideline as Redick followed Doncic back to the Lakers’ bench. Doncic