Ryu Pulled with Perfect Game

Not sure why this happened, but doesn't make much sense to pull Ryu in this came when he's thrown less than 100 pitches and has a perfecto going. Even if the closer setting is max, there has to be an exception for a no hitter and, especially, a perfect game.

https://onlinegames.strat-o-matic.com/game/454915/451

Actually, the substitution makes sense. Ryu had tired (to F3) after retiring the final batter in the 8th inning.