The Oakland County Competitive Robotics Association (OCCRA) runs a competition slightly smaller in scale compared to FRC during the fall in SE Michigan. The majority of teams in this league are FRC teams who use this as a training program for néw students.
The official OCCRA forums are part of CD, and can be found here:
http://www.chiefdelphi.com/forums/forumdisplay.php?f=24. There's game manuals for a few past games there.