The Chargers were founded in Los Angeles in 1959, and began play in 1960 as a charter member of the American Football League (AFL). They spent their first season in Los Angeles before relocating to San Diego in 1961 to become the San Diego Chargers. The team joined the NFL as result of the AFL–NFL merger in 1970. In 2017, the Chargers relocated back to Los Angeles after 56 seasons in San Diego, a year after the Rams had moved back to the city after spending 21 seasons (1995–2015) in St. Louis. The team previously played at the Los Angeles Memorial Coliseum during their first stint in Los Angeles, Balboa Stadium and San Diego Stadium (also known as Jack Murphy Stadium and Qualcomm Stadium) while in San Diego, and Dignity Health Sports Park (formerly named StubHub Center) from 2017 to 2019, while SoFi Stadium was under construction.