Why, why, why do the 49ers refuse to put in or even hint of putting in Carr. Last week the game was lost late and we keep in Smith. This week 2 terrible passes for interception and terrible reads of defense. At this point it is obvious that Smith looks for 1 receiver and if covered goes to Gore. Any defense in the league can find a way to stop him or get him to turn over the ball. Is there another team with so much promise that has started 0 and 4 that has not been willing to look at the backup QB? I am not saying Carr will save us, but mature head coaches know when to change things up, even for 1 quarter.