NBA ref explains why the James Harden step-back jumper isn't traveling

The James Harden Step Back doesn't always get called a travel by NBA referees.
Zach Zarba, a 15-year NBA referee, is here to weigh in on whether or not the move is a travel.
He takes a hint from when the ball is gathered.
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Following is a transcript of the video.Zach Zarba: My name is Zach Zarba and I'm a 15-year NBA referee. Some players have a controversial step-back jumper. They drive hard, then step back to create space and shoot.&