Bison Dele was born as Brian Williams on April 9, 1969, in Fresno, California — Easter Sunday — and was the second son to Patricia Phillips and Geno Williams, who was a professional singer and performed with The Platters in the 1970s. Dele was raised with his older brother, Kevin Williams.
At 6-foot-11, Dele was a high school basketball star in two different states, first at Bishop Gorman High School in Las Vegas as a junior and then at Santa Monica Catholic High School in Santa Monica, California, where he averaged 17.3 points, 12.7 rebounds, 2.1 assists, 2.5 steals and 9.1 rebounds as a senior.
Dele signed with the University of Maryland but came to campus in the wake of the death of Len Bias and left soon after, transferring back to the West Coast and the University of Arizona.