If you're interested in playing all 3 sports(baseball, football, basketball) with the same group of guys, come join the league.
Rules and info at http://www.3sportleague.com/const.php
We'll be starting with baseball this spring, and be running on cbssportsline.com.
I've been running a free league on this same concept, and it is awesome.
email me at mailto:email@example.com
with your interest/questions.