He played college football for the Stanford Cardinals[1] Stillwell attended Justice High School.
He only played 5 games as a backup defensive tackle, before suffering a career-ending left knee injury against the Minnesota Vikings.
He only played for 3 seasons with the Bears and his career was over by the young age of 26, due to multiple knee and back injuries.
Stillwell was born into an Air Force family, so he had to live in different places during his youth, including Japan, Hawaii, Alabama, Virginia, and California.
[6] He discussed his sports injuries in the 1985 documentary "Disposable Heroes: The Other Side of Football", directed by Bill Couturié.