the Warriors against the Cavaliers for the fourth consecutive season; this marked the first time in NBA history that the same two teams had met in the Finals for four consecutive years. The Warriors swept the Cavaliers to win their second straight NBA championship; previously, there had not been an NBA Finals sweep since 2007. On August 30, 2018, David West announced his retirement from the NBA after 15 seasons. Following the 2018 NBA Finals, writers for Sports Illustrated, USA Today, The Wall Street Journal, and the New York Daily News described the Warriors as a dynasty. The Warriors returned to the Finals the following year and lost 4–2 to the Toronto Raptors. 2019–2021: Return to San Francisco and struggles with injuries In April 2014, the Warriors began the purchase process for a 12-acre (4.9 ha) site in Mission Bay, San Francisco, to hold a new 18,000-seat arena, which was expected to be ready beginning with the 2019–20 NBA season. The location was selected after an original proposal to construct the arena on Piers 30 and 32, just south of the Bay Bridge, met with vocal opposition due to concerns about traffic, environmental impacts and obstruction of views. The new location, which still faced some vocal opposition in San Francisco, eliminated the need for voter approval as required with the original site. The move also elicited criticism due to the perceived alienation of a loyal fanbase in Oakland. The sale was finalized in October 2015 and naming rights were sold to JPMorgan Chase for the arena to be called the Chase Center. Although the Warriors considered a name change, possibly returning to their former name of San Francisco Warriors, it was ultimately decided that they would remain the Golden State Warriors upon their return to San Francisco. After the Finals loss to Toronto, during which Durant tore his Achilles and Thompson tore his ACL, Durant chose to sign a four-year deal with the Brooklyn Nets. In order to not lose Durant for nothing, the Warriors sent Durant along with a protected first-round pick (2020) to the Nets in exchange for D'Angelo Russell in a two-way sign-and-trade. The sign-and-trade triggered a hard cap for the Warriors, who were forced to trade Iguodala's $17 million salary to the Memphis Grizzlies while also giving them a top-4 protected 2024 first-round pick as incentive. The Warriors played their first regular-season game at the Chase