As soon as Nash received the ball, Roger had already rotated into position, not giving the Canadian a scoring chance.
He didn't even choose to challenge Roger but directly passed the ball to Caron Butler, whom Roger had left open.
During this period, Butler was a rather classical wing, skilled at mid-range shots and breakthroughs, but very unreliable from three-point range. You could think of him as a poor man's version of Demar DeRozan.
So when he got the ball, Caron Butler didn't shoot directly but chose to drive.
But he had just taken two steps when Tayshaun Prince, who had been doubling Kobe, moved back in front of Caron Butler.
Seeing that the drive was hopeless, Caron Butler stopped abruptly and attempted a jump shot. Under the disturbance of the Little Prince's long arms, the basketball bounced off the rim, and the Warriors' pressure defense strategy yielded results in the first play.