This team was part of the failed XFL begun by Vince McMahon of World Wrestling Entertainment and by NBC, a major television network in the United States.

They were in the Western Division with the Los Angeles Xtreme, Las Vegas Outlaws and Memphis Maniax.

The team played in Pacific Bell Park in San Francisco; despite having the smallest stadium in the league, they also had the highest average attendance (34,954).

In the first round, the Demons defeated the Orlando Rage, who had the best regular season record (8-2), by a score of 26-25.

NBC dropped the XFL after the first season (2001) due to dismal ratings, and the league folded soon afterwards.