D.I. is a Southern California punk band featuring ex- Adolescents and Social Distortion drummer Casey Royer on vocals. Royer formed the band after he and former Social Distortion original member Rikk Agnew (also formerly of Christian Death), left the original Mike Ness Social Distortion crew.
Since forming in 1981, D.I. has had many line-up changes over the years and Royer has been the only constant member of the band. The rotating line-up usually consists of former members of the Adolescents and Social Distortion (including the Agnew brothers, Rikk and Alfie Agnew). The band has continued to work, although they have had inactive periods, which include the band going on hiatus between albums. During their years of touring and recording albums, D.I. have never gained a huge mainstream success, but they have influenced many of the mostly formed in the 1990's melodic hardcore punk and punk rock revival bands, including Face to Face, Guttermouth, Jughead's Revenge, The Offspring, and Pennywise. Members of the band also joined up with Daddy X and the Dirtball of the Kottonmouth Kings, to create the punk rock band the X-Pistols, in 2010.
D.I. is the eponymously titled debut EP by the American hardcore punk band D.I., released in 1983 through Revenge Records. It was recorded by the band's early lineup of Casey Royer, Rikk Agnew, Tim Maag, Derek O'Brien, Steve Roberts, and Frederic Taccone. The EP was re-released in 1987 by Triple X Records as Team Goon with four additional tracks: The first three—"Nuclear Funeral", "The Saint", and a cover version of Gary Glitter's " Rock and Roll Part II"—were recorded by the band's mid-1980s lineup of Royer, John Bosco, Steve Garcia, and brothers Rikk and Alfie Agnew, while the fourth—a cover version of Devo's "Uncontrollable Urge"—was recorded by the late-1980s lineup of Royer, Bosco, Steve Drt, Sean Elliott, and Hedge.