They looked dead in the water...until they didn't.
That's actually very typical of baseball, when teams have strong starting pitching. Starter shuts down the offense, but gets pulled after 90 pitches. A relief pitcher gets lit up - because at the end of the day, middle relievers are still guys who weren't good enough to cut it as starters, or one-inning-dominant enough to be closers.
Which means you don't write off a club that's down by one run in the sixth inning.