He was selected by the Kansas City Chiefs in the third round of the 1999 NFL draft, and also played for the Baltimore Ravens, St. Louis Rams and Las Vegas Locomotives.

Stills attended Valley Forge Military Academy, where as a senior he registered 162 tackles with 7.5 sacks.

Stills was selected by the Kansas City Chiefs in the third round (75th overall) in the 1999 NFL draft.

The following year, he posted 15 tackles and also had a period in NFL Europe, playing for the Frankfurt Galaxy.

He was known for his tremendous special teams play, and his famous celebration in which he "punches the ground" after he would tackle a returner.

[6] His two sons, Dante and Darius, played football at West Virginia University.