... pick who starts at quarterback for an NFL might lack self-confidence?

Believe it.

San Francisco 49ers' beat writer Matt Maiocco of the Santa Rosa Press-Democrat said on KNBR Tuesday that the signing of free agent passer David Carr could leave Smith "looking over his shoulder" at just the time he was easing into the role as the 49ers No. 1 guy.

Maiocco's blog, should be a go-to spot for every 49ers fan:

http://blog.pressdemocrat.com/49ers/

"The 49ers don't have to openly announce that there'll be a quarterback competition," Maiocco said. "But, if Alex doesn't perform as well as they expect ... the club would have to make a change."

Even having the possibility of Carr winning job gives Smith a reason for conce...

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