In Game 1 of the ALDS, Craig Kimbrel gave up one run while pitching 1.1 innings, with the lone run coming from a missile off the bat of Aaron Judge. In Game 4 of the ALDS, he allowed two runs in one inning while walking two and hitting a batter. In Game 2 of the ALCS, he allowed another run in one inning. Finally, last night, he allowed one run in two innings while walking three and hitting a batter.
In the postseason, this cannot happen. He is struggling badly, and it is unclear if he can break out of it.