I know we are going away from Bob Gibson but leagues have put in rules to combat what they seem as unfair before.
NFL-Holly Roller rule is the that a fumble can't be advanced in the last two minutes of a game due to some shenanigans from the Oakland Raiders in 1978.
NHL-4x4 hockey on coincidental penalties was eliminated due to the success of the Edmonton Oilers.
I'm sure there are more...
NHL removed the penalties in general because of Montreal
Prior to that the penalized players served the entire 2 minutes regardless of how many goals Montreal scored
Now 1 goal and penalty is over, even if you score in 10 seconds
They removed the hanging rule (offsides) because of the Bruins
Used to (literally) park in front of the goalie and wait to score
Gibson was dominant in his era*
And this was a pitchers era to begin with
Someone else mentioned Morris above but Morris never struck out 17 batters in a World Series game and never had an ERA anywhere close to 1.12 in a season
He won two World Series single handily and barely lost the 3rd
Just imagine his highest paid season ever was $175,000
Scary