In 1971, the league re-aligned itself geographically. The Owen Sound Greys and Collingwood Blues jumped to the Mid-Ontario Junior B Hockey League. The Waterloo Siskins and Kitchener Ranger B's moved over to the Western Ontario Junior B Hockey League. The Burlington Mohawks were the only team to stay put. In return, the Central League gained many teams from the Mid-Ontario Junior B Hockey League, like the Oakville Blades, Milton Flyers, Hespeler Shamrocks and Streetsville Derbys. They also gained the Dundas Blues and the Brampton Vic Woods.