San Francisco 49ers
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. The name "49ers" comes from the prospectors who arrived in Northern California in the 1849 Gold Rush. The team is legally and corporately registered as the San Francisco Forty Niners. The team began play at Kezar Stadium in San Francisco before moving across town to Candlestick Park in 1970 and then to Levi's Stadium in Santa Clara in 2014.
Multi-purpose stadium
The Miami Marlins, which changed their name from the original Florida Marlins in November 2011, moved to Marlins Park, a new retractable-roof stadium in Miami, in 2012. Sun Life Stadium (now Hard Rock Stadium) was then renovated to eliminate its baseball functionality, making it a football-only stadium. With the Marlins' relocation, the Oakland Athletics are the last team in the U.S. still sharing a stadium with an NFL team (the Oakland Raiders), the Oakland Coliseum. This arrangement will end once the Raiders move to Las Vegas (most likely in 2020), after which each NFL and MLB franchise will have its own stadium. The Athletics are currently seeking a new home; they are currently exploring plans to build Oakland Ballpark. Before announcing their upcoming move to Las Vegas, the Raiders suggested a move back to Los Angeles, where they played from 1982 to 1994, and also actively explored a move to the Alamodome in San Antonio; other parties suggested that the Raiders share the new Levi's Stadium in Santa Clara with the 49ers.