To create a category of the form "Sport clubs (dis)established in YYYY", sport is a sport, clubs is team or clubs and YYYY is a 4-digit year.
e.g. Category:Baseball teams established in 2014
Usage
{{Sport clubs (dis)established in YYYY category header}}
Optional:
{{{parentsport}}} and {{{parentsport2}}} to categorize this sport under other sports.
e.g. {{Sport clubs (dis)established in YYYY category header|parentsport=association football}}