Leinart was going to start last week. Denny Green changed his mind. And Mort's original report said (paraphrasing), "Barring a change of heart by the coaching staff, Leinart will start".
How would you have liked him to report it differently? If they hadn't said a word and Green went forward with it, people would be #####ing that nobody let them know about Warner's benching soon enough to react to it.
That was
not his initial report. That was the subsequent reports when he started backpedaling. His first report, an hour or so before the Monday night game went something along the lines of, "Green won't commit to QB Kurt Warner, so we'll go ahead and report that Matt Leinart is starting next week versus the Falcons." If he had a source, he didn't mention it during the first report and sounded like he was just throwing it out there to see if it stuck.