Granted Pete Carroll is known as a great motivator
I still think there was something going on there between Matt and wisenhunt that kept Matt from grinding and performing there.
Just think about it. Leinart was the top dawg at a college in a city that offered more spotlight and glory than 90% of NFL teams could ever offer him. Seriously. Winning the ship and Heisman at USC > winning the super bowl for majority of NFL teams. Playing for Pete Carroll > 90% of NFL coaches.
Stepping down from USC star QB to backup for a weak coach and backup for an offense he didn't fit just wasn't going to work for him
I'm not defending Matt for his lack of ability to make it work but Denver is one of those few NFL teams that could've set him up for success. Leinart also didn't get a second opportunity in another place ala Favre, as you mentioned. AL Davis wasnt really a career reviver
Cutler will never have half the heart that lion heart did