Down 7 points with no timeouts and 1:09 left, Joe Flacco kept his cool in single-digit temperatures.
Playing from behind throughout the second half, Facco rolled out on 3rd down and 3 and hit Jacoby Jones, who didn't have a catch all game, for a 70-yard strike to tie the score at 35 and send the game into overtime.
The Ravens had the ball for the first possession of overtime but stalled near midfield and couldn't get anything done with their second possession. But the defense, which was able to force Peyton Manning into three turnovers Saturday, came through.
Cornerback Corey Graham, who returned an interception of Manning in the first half 39 yards for a score and a 14-7 lead, did it again. Manning was flushed from the pocket by Paul Kruger and threw across to body to Brandon Stokley. Graham undercut the route to give the Ravens the ball at the Broncos' 45.
Rookie kicker Justin Tucker drilled a 47-yard field goal early in the second overtime period to pull off the upset as the Ravens advanced to play in the AFC championship game for the second year in a row. They'll travel to face the winner of the Houston Texans-New England Patriots.
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