That sounds like a LOT of fun... but I don't have the time to make multiple sigs for a contest I'm afraid. It's the final semester of my master's degree and I gotta concentrate on my applied project.
I'd really like to compete against your football artists though (I'm a football side lurker you see)
Some time we should organize a cross-cafe "Battle of the Artists". The best of the football side vs. the best of the baseball side, with brackets like you have set up for this contest. That would be killer.