Does the Mel Blount rule count? Blount was beating the heck out of receivers so they changed the rules for pass interference.
In basketball there are the following:
Ted Stepien Rule, forbidding NBA teams from trading consecutive #1 picks.
Magic Johnson Rule, forcing a player to leave the field of play if they bleed.
Trent Tucker Rule, put into place in 1989, this rule states that 3/10ths of a second must be on the clock for an inbound pass to be legal. Or something like that.
(not really a rule)
Jordan Rules, more of a harassing defensive strategy dreamed up by Chuck Daly which boils down to “keep changing defenses on the guy to confuse his teammates and bang the ever loving shit out of him when he drives towards the basket.”
Larry Bird Exception, allowing a team to go over the salary cap to keep their franchise player.
Allen Houston Rule, allows a team to waive a player prior to October 1st w/o having to pay further luxury tax on that player.
(Ouch, to have such a rule named after you.)
Ewing Theory When your star leaves, and your team becomes “mysteriously” better.
There’s also the Riley rule, which (IIRC) prohibits the same person from being head coach of an All-Star team two consecutive years. This was because of the Lakers’ dominance in the 1980s with Pat Riley as head coach. (Here’s hoping the 2010s belong to the Lakers also!)