That slump is the real subplot in Atlanta right now. The Braves are still holding first place in the NL East, but a rough stretch through August has let the field creep back into the picture, and the schedule ahead doesn't get any easier. None of that changes what Sunday actually is on paper — a last-place team playing out the string against a contender defending its spot.
Both teams still have to get through the first two games of this set before Sunday means anything, so treat the form card as a snapshot, not a preview of who shows up at Truist Park. Colorado took 2 of its first 3 against Washington and had won 2 straight as of the data here, while Atlanta had reeled off 3 straight of its own after finishing a series with Milwaukee. Whatever this looks like by Sunday will depend a lot on how those two games in between go.
Colorado's pitching depth is legitimately thin — Freeland, Quintana and Dollander are all shelved, on top of a bullpen already picking up the pieces from a lost season. Atlanta's list is shorter and mostly relief arms working back from injury, which matters less on a given Sunday than whether the lineup finds itself again. A last-place team and a division leader in a mild funk isn't the most obvious appointment viewing, but the standings context keeps it from being a total throwaway.