At the age of 14, Casey released his first mixtape, titled Customized Greatly Vol. 1; while he was performing by his stage name at the time, Custom. Casey was one of the founding members of the hip hop collective Odd Future, appearing on the collective's first effort The Odd Future Tape, before he decided to branch out on his own, after his first mixtape release. In an interview with Respect Mag, Casey stated it as: "It’s hard to explain, really, but I just had more of a [different] vision for my own rap career. I wanted to do my own thing."
