The Great Lakes Baseball League has expanded to seven teams .
The Great Lakes Baseball League now includes the Travelers , Soo Black Sox , Traverse City , Alpena , Mancelona , Petoskey and Grayling .
The Great Lakes Baseball League has expanded to seven teams , and now includes the Travelers , Soo Black Sox , Traverse City , Alpena , Mancelona , Petoskey and Grayling .