The Basketball Association of America (BAA) was a professional basketball league in North America, founded in 1946. Following its third season, 1948–49, the BAA absorbed most of National Basketball League (NBL) and rebranded as the National Basketball Association (NBA).The Philadelphia Warriors won the inaugural BAA championship in 1947, followed by the Baltimore Bullets and the Minneapolis Lakers in 1948 and 1949, respectively. Six teams from the BAA remain in operation in the NBA as of the 2017–18 season, three that co-founded the league in 1946 and three that joined it from the NBL in 1948 (below). The inaugural BAA season began with 11 teams, of which four dropped out before the second season. One ABL team joined to provide 8 teams for 1947–48 and four NBL teams joined to provide 12 for 1948–49. The records and statistics of the BAA and NBL prior to the merger in 1949 are considered in official NBA history only if a player, coach or team participated in the newly formed NBA after 1949 for one or more seasons.The NBA generally claims the BAA's history as its own. For example, at NBA History online its table of one-line "NBA Season Recaps" begins 1946–47 without comment. It celebrated "NBA at 50" in 1996, with announcement of its 50 Greatest Players among other things.