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.
Sun Devil Stadium
Whenever the Cardinals struggled, Sun Devil Stadium was frequently one of the quietest stadiums in the league. Cardinals home games often did not sell out in time for them to be aired locally, in compliance with NFL blackout policy at the time. The few fans who did show up for games were most often rooting for the visiting team, creating what amounted to "home games" on the road for many opposing teams. A significant percentage of the state's residents only live there during the winter and live elsewhere for the rest of the year, and many of Arizona's permanent residents either grew up in other states or have roots outside the state. In 2005, for instance, all home games (except for the 49ers game which was held at Estadio Azteca in Mexico City) failed to sell out and could not be broadcast on local television.