According to Bernie Miklasz, the Cardinals are unlikely to trade any of their top prospects, including Michael Wacha, Carlos Martinez, Oscar Taveras and Kolten Wong. For GM John Mozeliak to even consider trading any of his big 4 prospects, the deal would have to deliver an ace pitcher or a significant upgrade at short, neither of which is currently available on the trade market.
Recent rumors have the Cardinals continuing to look at Jake Peavy, as a Cards scout will be in attendance for Peavy's start tonight against the Tigers, according to ESPN's Jayson Stark.
In addition, even though the thought of a trade involving Martinez for the Sox's Alexei Ramirez was shot down, the Cardinals and White Sox continue to scout each other's personnel, according to Mark Gonzales of the Chicago Tribune.
Finally, Ken Rosenthal of Fox Sports weighs in on the Cardinals saying that they are not actively pursuing the Astros' Bud Norris or the Jays' Mark Buehrle. The recent addition of Ervin Santana may garner a look, but overall Rosenthal doesn't see the Cards making a big move either.
A week ago I said pretty much the same thing as Miklasz and Rosenthal, the starting pitching market is pretty meh and the Cardinals would be wise to hold on to their prospects instead of chasing guys like Matt Garza. None of the starting pitchers currently on the market is a significant enough upgrade worth gutting you farm system over.
Unlike the 2012 trade deadline when the Brewers traded Zack Greinke or the 2009 and 2010 trade deadline deals involving Cliff Lee, there are no top of the rotation starters available for the Cardinals to pursue.
Thus, for now at least, its best for the Cardinals to hold on to their big 4 and maybe try to get some bullpen help at a much lower cost.