SACRAMENTO — In the closing minutes of the Warriors' Summer League win over the Heat on Monday night, Jordan Bell picked up his dribble near the foul line and tried to throw an alley-oop to himself off the backboard. Bell couldn't get a grip on the rebound and his dunk attempt clanked off the front of the rim and bounced out of bounds. Bell, wearing an aw-shucks grin, shook his head in disgust. It was the type of learning moment that Summer League was created to provide. "I told him, 'This is Summer League, you can get away with that.