I'm a consensus top 10 p4p choice and was only stopped twice in my career, both times to fighters from Pittsburgh.
Henry Armstrong comes close as he was stopped by Zivic who was from Pittsburgh and Al Iovino, who was from Swissvale, Pennsylvania.
Good call, although Swissvale is just a few minutes outside Pittsburgh proper. Al had almost all of his fights in Pittsburgh so he's essentially a Pittsburgh fighter.