From the way it looks here in my third-floor home office, I can see two things that threaten the Cardinals' hold on the National League Central:
1. Injury damage to the starting rotation.
2. A dormant offense.
The more immediate concern is an offense that requires a transfusion. And while the awaited return of Matt Holliday is a plus, he's only one bat. The Cardinals need more bang than that.
The Cardinals currently have the advantage of standings math, leading second-place Pittsburgh by 4½ games and third-place Chicago by 7.5 in the NL Central.