LH URL Redirects sends old addresses somewhere useful. It keeps one table of redirect and 410 Gone rules for a whole WordPress Multisite network, stored once on the main site, and applies them wherever a visitor would otherwise hit a page that does not exist.
Rules are keyed on a host and path rather than on a site, so one place holds every redirect on the network, including for old domains that no longer have a site at all: point a retired club domain at its new home and anyone still using the old address arrives in the right place.
Network-activate the plugin to create its table. It replaces LH Response Handler, whose rules it can import.