Whether or not Leinart is the QB of the future or not, we have now seen enough of him in substitute situations to know just how big a drop-off in performance there is when Warner leaves a game. It is substantial and, in my view, shows two things: just how great Warner is, and just how far Leinart has to go. The Cardinals passing offense is intricate and requires great timing and “feel” between QB and receivers. Those who think the Cardinals have great receivers and that any QB can come in and be productive are kidding themselves. The improved running game will certainly take some pressure off Leinart should he have to take over, but he does not instill confidence with performances like this and others this season. You have this feeling that he is a little disoriented and unsure of himself. Up to now I have been willing to write it off as simply being rusty from lack of work, but this is the NFL and backups have to be able to come in and take charge capably. Given the number of snaps Leinart has taken in his career, he ought to be more comfortable and in command than he seems. Whether this is from lack of work in practice I don’t know, but this is the second recent appearance in a row where he threw an “out” pass when Fitzgerald was running an “in” pattern. In summary, I don’t think the 10 of 14 passing is an accurant indication of his proficiency. They’d better work things out in practice or the Cardinals will have a big problem if Warner goes down.