Battle rapper and underground artist Robert Diaz aka Pumpkinhead died early Tuesday morning. The cause of death is currently unknown. Pumpkinhead is a New York native and is known for his many rap battles. Although he was never as main stream as he would like, he did make many friends in the industry including Talib Kweli. Kweli posted this on his Instagram to share his thoughts.

Check out a video of him in action from 2009.

We send our condolences to his family.