Blue 6 gets the ball on a rebound and passes it to Blue 23, who starts a drive to the basket. A contact occurs and the referee calls a foul in the act of shooting to Yellow 4.

Article 25.2.1 A player who catches the ball while he is progressing shall release the ball to start his dribble before his second step.

The first step occurs when one foot or both feet touch the floor after gaining control of the ball.
The second step occurs after the first step when the other foot touches the floor or both feet touch the floor simultaneously.

Outcome: Incorrect decision from the referees. Blue 23 gained the control of the ball with his left foot touching the floor (step 0 or gather step). His first step occurred when his right foot touched the floor and the second step when his left foot touched the floor again. The ball was released after his second step, so he committed a travelling violation.