That's assuming they get to Kimbrell. From what I can tell, Nats have a better pen, top to bottom than the Braves. That doesn't seem like a huge weakness to me.
They get to Kimbrel more often than not. O'Flaherty, their setup man, is also invincible.
The Braves have a stronger pen, no question about it. Our pen peaked back in May/June and hasn't been the same since.