Metallica is an American heavy metal band formed in Los Angeles, California. Metallica was formed in 1981 when vocalist/guitarist James Hetfield responded to an advertisement posted by drummer Lars Ulrich in a local newspaper. The band’s current line-up comprises founding members Hetfield and Ulrich, longtime lead guitarist Kirk Hammett and bassist Robert Trujillo. Lead guitarist Dave Mustaine and bassists Ron McGovney, Cliff Burton and Jason Newsted are former members of the band. Metallica collaborated over a long period with producer Bob Rock, who produced all of the band’s albums from 1990 to 2003 and served as a temporary bassist between the departure of Newsted and the hiring of Trujillo.
On May 2, 2015, Metallica performed their third annual Metallica Day at AT&T Park. Metallica were also announced to play at X Games for the first time at X Games Austin 2015 in Austin, Texas. On June 14, 2015, Hetfield and Hammett performed The Star-Spangled Banner live via electric guitars prior to game 5 of the NBA Finals between the Cleveland Cavaliers and Golden State Warriors at Oracle Arena in Oakland, California. In late October, the band unveiled a new website with an introduction from Ulrich containing footage from the studio of the band working on new material. On November 2, Metallica were announced to play “The Night Before” Super Bowl 50 at AT&T Park. Metallica announced they would be opening the U.S. Bank Stadium on August 20, 2016, with Avenged Sevenfold and Volbeat as support. According to Hammett, the new album should be released in 2016, and at latest, at the beginning of 2017.