The remaining four Northern League teams (Joliet Jackhammers, Lake County Fielders, Rockford Riverhawks, and Schaumberg Flyers) have applied individually to join the Frontier League:
The article mentions that two of the teams (Joliet and Schaumberg) both have financial concerns which need to be addressed; and it also mentions that the Frontier League is going to take its time to analyze whether or not a specific team(s) will be admitted to the league. Rockford played in the Frontier League in 2009 and joined the Northern League for the 2010 season.
Should any changes be made in the coming days then it will be posted on this site.
There are several good books about the independent professional baseball leagues. You are welcome to see a list of suggestions through this link: Books Get notified of upcoming independent baseball tryouts from either of these services: first service or the second service. Prospective players can find some helpful resources here We will be providing a growing list of possibly helpful tips and suggestions on various baseball information. This will range from "how to" information about baseball skills all the way to helpful information for casual baseball fans. Please click the link for more information: Tips And How To Information