Jason L. Martin (born May 8, 1985), formerly known by the stage name Problem, is an American rapper, songwriter and record producer. He has released nineteen mixtapes in his career, the most recent being S2, released 2018. His debut EP, Understand Me, was released on December 10, 2013. He is best known for his single "Like Whaaat" and for featuring on E-40's "Function".