According to Bernie Miklasz of the St. Louis Post-Dispatch, the Cardinals are not a serious player for Jake Peavy. Miklasz’s Cardinals sources downplayed the idea and noted that they’ve only had one conversation with the Padres.
As Miklasz says, it could be the money, the prospects, or both. Viva El Birdos believes it would limit roster construction. If the Cardinals take a pass and the Astros don’t have the goods, it might be down to the Braves, Dodgers, and Cubs.