Man, that's old school. We had a contest back in like 2002 to let people submit some of the games in there. I ended up trying to run one of the sporting events using normal D&D initiative, and realized it's kinda unfair if a running back can sprint 120 feet on his turn before any of the opposing team can react, so some tweaks are probably in order.
I still really enjoy that book. I need to find my print copy.