The Warriors were born in Philadelphia in 1962 moved to San Francisco and in 1971 they moved to Oakland. Although it had been earlier attempts at professional basketball leagues, including the American Basketball League and National Basketball League, the BAA was the first league to attempt to play primarily in large arenas in major cities.During those years the level of the BAA was not obviously better than that of other leagues or teams were comparable to independent clubs like the Harlem Globetrotters. For example, Baltimore Bullets ABL finalist in 1947, moved to the BAA and won the title in 1948, followed by the Minneapolis Lakers won the NBL in 1948 and the following year in the BAA. Following the 1948 season, the BAA agreed to merge with the NBL, renamed the National Basketball Association with 17 franchises located in a mixture of large and small cities and wards with more capacity and smaller gyms. In 1950, the NBA consolidated to eleven franchises, a process that continued until 1954, when he came to have only eight teams still remain (Knicks, Celtics, Warriors, Lakers, Royals / Kings, Pistons, Hawks and Nationals/76ers) . By then, the league also saw its franchises move to larger cities.The Hawks left the area Tri-Cities “to Milwaukee and then to St. Louis the Royals from Rochester to Cincinnati, the Pistons from Fort Wayne to Detroit. In 1950 also saw the integration of the NBA, with the incorporation of African American players in the league, as was Chuck Cooper (Boston Celtics), Nat “Sweetwater” Clifton (New York Knicks) and Earl Lloyd (Washington Capitols). During this period, Minneapolis Lakers, led by center George Mikan, won 5 rings, establishing the first dynasty in the history of the league. Today, more than fifty years later, the NBA is composed of players from many different races and diverse backgrounds and cultures. The majority (80 ) of players today are African Americans. After that black players entered the NBA, his playing style changed it. They had a very extroverted style, and were faster and capable. Incorporated into the game mate, and acted a little cocky movements and showy.It was a style “black” to play basketball, fast and agile, and with great handling the ball. To increase the pace of the game and cheer, joined rule of the 24 seconds of possession, in determining that a player must throw before time expires, or whether its release does not play hoop or basket becomes is beep violation of game and the offensive team loses possession. Wilt Chamberlain was able to score 100 points in a game. In 1956, rookie center Bill Russell joined the Boston Celtics team that already had one of the best point guards in the league, Bob Cousy, and one of the most successful coaches in the history of the NBA, Red Auerbach. With Russell, the team would become a legend, winning 11 rings in 13 seasons in which it was active.In 1959 the center Wilt Chamberlain entered the league and soon became one of the most dominant players that ever stepped on a basketball court, with all types of records in points and rebounds, and reaching even to score 100 points in a game. His rivalry with Russell is remembered as one of the largest in sports history. During this period, the NBA was strengthened by the Minneapolis Lakers move to Los Angeles, the Philadelphia Warriors to San Francisco, and the Syracuse Nationals to Philadelphia. In 1967, the league faced a new external threat with the formation of the ABA. The leagues engaged in a bidding war for talent. The NBA got the most important college star of the era, Kareem Abdul-Jabbar (then known as Lew Alcindor), who together with Oscar Robertson led the Milwaukee Bucks to a title in his second season, and who later played in five Laker championship teams.However, the NBA’s leading scorer, Rick Barry, jumped to the ABA, as did four veteran referees-Norm Drucker, Earl Strom, John Vanak, Joe Gushue. Michael Jordan led Chicago Bulls to 6-ring. The ABA also had success in signing young artists, including Julius Erving, in part because it allowed teams to sign since high school.