The problem came because their relievers were too generous; the Braves pen finished 15th (dead last) in walks-per-nine with 4.41. Walk rates for the workhorses of the pen went up and strikeout rates dropped.
As a result, the Atlanta pen finished tied for eighth in saves with 40, tied for sixth for fewest blown saves with 20, and had the fifth most holds in the NL. Too many walks mean too many pitches thrown by arms not used to working that hard for that long.
Sunday told us the plan for the pitching staff in the postseason. That plan includes adding at least two and maybe three starters to the pen instead of relying on the weakest links.