The team was founded in 1946 as a charter member of the All-America Football Conference (AAFC) and joined the NFL in 1949 when the leagues merged. The 49ers were the first major league professional sports franchise based in San Francisco and are the 10th oldest franchise in the NFL. The team is legally and corporately registered as San Francisco Forty Niners.[2] The team began play at Kezar Stadium in San Francisco before moving to Candlestick Park in 1971 and then to Levi's Stadium in Santa Clara in 2014.