David Ung is a yo-yoer sponsored by YoYoFactory. He is currently on the YoYoFactory Contest team and is known for his clip videos.

He has placed 4th overall (2nd in region) at BLC in 2007. He placed 2nd overall (1st in region) at BLC in 2008 and 4th overall at BLC in 2009. He was a semi-finalist at the first annual DXL competition in 2009. In 2010, David placed 10th at BAC and 1st at BLC. And in 2011, David placed 3rd at BLC.