The Melbourne Winter Baseball League, formerly the Victorian Winter Baseball League, is the biggest winter baseball league in Victoria. It is run by Baseball Victoria as of 2010 after it took control from the VPBL after a Memorandum of Understanding. There are 25 different clubs and field teams in five grades from A to E. Every Grade has a reserves as well.
Ringwood District and Diamond Valley
The Melbourne Winter Baseball League is made up from two leagues. One being the Ringwood District Baseball League and the other, Diamond Valley Baseball League. This is more important for juniors as junior teams only play teams in their own district. Except for under 17s where both districts play each other. At the state winter championships these two districts play against each other