William Joseph Crawford (born on January 28, 1984), better known by his stage name Ya Boy, is an American rapper from the Fillmore District of San Francisco, California. He graduated from El Camino High School in 2001. Shortly afer, he started rapping in the year 2002, with his song "16's With Me" being the first to hit it big locally. It was produced by South San Francisco producer Big D and sampled the Imperial March from Star Wars. Ya Boy gained more attention from his song "100 Bars of Crack" where he raps 100 bars over Dr. Dre's "Nuthin' But a "G" Thang" beat (featured on The Black Wall Street Journal Vol. 1) and "100 More Bars" which is done in the same style, but it uses the instrumental from the Jim Jones song "We Fly High". Ya Boy was given his name by his cousin Bailey, and was helped to develop into a rap artist by his other cousin San Quinn. In the Summer of 2005, Ya Boy released his first solo mixtap