He also was a member of the Fort Worth Cavalry in the Arena Football League (AFL).
He played college football for the TCU Horned Frogs, earning consensus All-American honors in 1991.
[1] Blackwell was signed as an undrafted free agent by the Chicago Bears after the 1992 NFL draft.
[8] In June 1994, he signed with the Fort Worth Cavalry of the Arena Football League.
On December 12, 1994, he was selected by the Connecticut Coyotes in the Arena Football League expansion draft.