He played college football for the Nebraska Cornhuskers and was selected by the Kansas City Chiefs in the seventh round of the 1998 NFL draft.

Warfield finished the 2004 NFL season with 45 tackles after three straight years of over 70.

In 2005, Warfield struggled with legal issues that threatened his NFL career.

[2] In the wake of this incident, the NFL suspended Warfield for the first four games of the 2005 season.

[3] On April 3, 2006, Warfield was signed by the New England Patriots but was released shortly after training camp, never playing in a regular season game for the team.