Keith Murray (born September 13, 1974, Central Islip, New York) is a rapper and a member of the rap trio Def Squad, which includes fellow rappers Redman and Erick Sermon.

Before Murray ever recorded an album, he battled Big Daddy Kane, a man widely considered to be one of the greatest MCs of all time. At that time, Murray went by the name of MC Do Damage. Murray did not win the battle, but he did earn the respect of Kane. Later, Murray would be introduced to Erick Sermon of EPM