Stephen Maynard Clark (23 April 1960 – 8 January 1991) was an English musician, co-lead guitarist for the British hard rock band Def Leppard up until his death in 1991 due to a combination of alcohol and multiple prescription drugs. In 2007 Clark was ranked #11 on Classic Rock Magazine's "100 Wildest Guitar Heroes". Description above from the Wikipedia article Steve Clark, licensed under CC-BY-SA, full list of contributors on Wikipedia.
