Niners start with a three and out

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It looked like the San Francisco offense would commence Super Bowl XLVII by carving up the Baltimore defense, once quarterback Colin Kaepernick found tight end Vernon Davis for a 20-yard pass on the first offensive snap.

But a yellow flag sitting at the 22 became an illegal formation penalty, wiping out the gain.

With a first and 15, the 49ers did nothing in three plays after the infraction.  No gain on a running play, an incomplete sideline pass to tight end Delanie Walker, and another run on third and 15 that gained only three.

And the Ravens already are driving.