Tracy Lynn Curry (born June 10, 1968), primarily known by his stage name The D.O.C., is an American rapper from Dallas, Texas. In addition to a solo career, he was a member of the hip hop group Fila Fresh Crew, and a creative force behind the gangsta rap group N.W.A, where he co-wrote many of their releases. He has also semi-frequently worked with Dr. Dre, who is one of the founders of N.W.A and produced two of his solo albums. D.O.C. also appeared on a skit called "The $20 Sack Pyramid" on Dr. Dre's 1992 album The Chronic.

After Fila Fresh Crew split up in 1988, The D.O.C. went on to pursue a successful solo career. In 1989, he released his debut album, No One Can Do It Better, which reached number-one on the US Top R&B/Hip-Hop Albums chart for two weeks and spawned two number one hits on the Hot Rap Songs chart: "It's Funky Enough" and "The D.O.C. & The Doctor". The album went platinum five years after its release. Months after the release of No One Can Do It Better. In late 1989, The D.O.C. almost died when a car accident resulted in crushing his larynx, permanently changing his voice. Since his recovery, he has released two more albums, Helter Skelter and Deuce, both released 7 years apart. Since 2006, The D.O.C. has been working on new material for his fourth album Voices through Hot Vessels.