AT RUCKER PARK in New York, people sat on rooftops and climbed trees to watch Julius Erving play. In Louisville, Kentucky, Artis Gilmore would pull up in his fancy car, still wearing his fancy suits, and just ball. Kevin Durant first measured the worth of his game on the D.C. playgrounds, and Arthur Agee chased his hoop dream in Chicago. The Philadelphia outdoor courts once boasted a who's who of the city's best ballers, and in Los Angeles, playground legends with names such as Beast, Iro [...]