Page "XFL" Paragraph 7

Contrary to popular belief, the " X " in XFL did not stand for " extreme ", as in " Extreme Football League ".

When the league was first organized in 1999, it was originally supposed to stand for " Xtreme Football League "; however, there was already a league in formation at the same time with that name, and so promoters wanted to make sure that everyone knew that the " X " did not actually stand for anything ( though McMahon would comment that " if the NFL stood for the ' No Fun League ', the XFL will stand for the ' extra fun league '").

The other Xtreme Football League, which was also organized in 1999, merged with Arena Football before ever fielding its first game.