If you make the background dark, go with white text. Otherwise, just use black text. Avoid other text colors (unless they are used for headlines etc.) Just keep messing around with the color scheme until you get something that you like and isn't hard on the eyes (good contrast).
I also think you should have tabs for each sport (e.g. Soccer, Basketball, Football, Dodgeball, Golf) and you could discuss the popular tournaments going on for each such as the Blockland World Cup, Ravencroft's 2v2 Basketball Tournament, and Zapk's Golf.
