Bill Stevenson.

About Bill Stevenson

John William Stevenson is an American musician, songwriter, and record producer. He is the drummer, main songwriter, and only constant member of the California punk rock group Descendents since its inception. In late December 1981, he played a few concerts with the hardcore punk band Black Flag because their drummer, Robo, was detained in England after a tour there. He continued to tour with Black Flag and appeared on five of their studio albums, including the highly influential My War, until being dismissed in 1985. After this, he focused his attention on Descendents and played with the band until lead singer Milo Aukerman left in 1987. After Milo's departure, Bill and the other members of Descendents, Karl Alvarez and Stephen Egerton, recruited singer Dave Smalley of Dag Nasty and formed ALL. ALL went on to have two more singers, Scott Reynolds (1989–1993) and Chad Price (1993–present). Aukerman came back for the 1996 album Everything Sucks, the 2004 album Cool to Be You, 2016's Hypercaffium Spazzinate and the newest album 9th and Walnut. All and Descendents continue to tour between Stevenson's and Aukerman's respective careers as a recording engineer and a biochemist.