The game that not only spawned this particular league, but was the inspiration behind the creation of CSFBL itself...

WeBL is back in business and taking new managers!

http://webl.vivi.com/

The Web Boxing League, or "WeBL", is a boxing simulation game run over the Internet. You create fictional fighters and manage their careers. WeBL uses an improved version of the engine for the original Electronic Knockout (EKO) game.

WeBL is a strategy game. You create boxers with particular stats and design fight plans for use against player's other boxers. Fights are simulated off-line and the rules used in that simulation are public, so you can try to design the best possible fight plan for each match-up.