Another thing is he was likely facing better hitting in the playoffs.
It's hard to imagine a pitcher of his skill, who rose to the occasion, under great pressure, to even make it to MLB. Then, his numbers show he does better with RISP and Late & Close during the season, so there's no indication he wilts under pressure, there.
Then, suddenly, just because it's the playoffs, and his scattered numbers fall way short of his norm, we are supposed to think it HAS TO BE because it's the playoffs.
Players slump and rise, all the time. Nobody knows why. If they did, they could probably make a ton of money.
Yet, when a player slumps or does great in the playoffs, we are magically able to know FOR SURE, why it happened.
I've never heard a logical response to this point.
It's impossible to know for sure, unless it's some kind of injury.
It's also impossible to prove it can't be a choke or clutch thing.
Is it possible a player might get enormous butterflies under the intense pressure of the playoffs and not be able to overcome it? Of course. I can't prove it doesn't happen.