Head of the Diamond Lane Music Group, West Coast rapper Problem went from the mixtape underground to radio mix show favorite with his 2013 hit "Like Whaaat." Born Jason Martin in Germany but raised in Compton, Problem took his name from sports, giving other players "problems" on the basketball court. When it came to music, he got his start behind the scenes, writing music for and with Snoop Dogg, Daz Dillinger, Terrace Martin, and DJ Quik beginning in 2007. A year later he formed Diamond Lane Music and signed with a major as the title to that year's mixtape, Deal or No Deal 2:...