Transcript for Peyton Manning's Big Comeback Leads Denver Broncos to the Super Bowl
Denver. Go, Rosetta. And we have word tonight that 50 million of us watched the 2 championship football games yesterday. 50 million. Seahawks/broncos, on their way to the super bowl. And for quarterback Peyton manning, a real triumph after neck surgery. You can still see the scar running down the back of his neck right there. And coaches worried he would never play again. ABC's Ryan smith, now, says, last night, he showed us how wrong they were. Reporter: A triumphant day for Peyton manning and the Denver broncos. Not just for the win against Tom Brady's new England patriots. But grace under pressure. Like this -- a bad snap, a bobble. Turns into another lacer beam pass from the four-time mvp, just two years after a neck injury nearly ended his career. After all I've been through. Reporter: Four surgeries later, his vertebrae fused together. Surgeries like his limit mobility by 10%, making plays like this, all the more amazing. Is it shocking to think he's here? Yeah, it is shocking to think two years ago he wasn't even strong enough to play in that season. Reporter: They're facing a young, hungry Seattle seahawks. Their quarterback, Russell Wilson, is just 25, already a force. But it's their top-ranked defense that's really making waves. Leading the way with punishing hits and a brash cornerback, Richard Sherman, who made the game-winning play last night. And then -- I'm the best corner in the game. Don't you ever talk about me. Reporter: Manning will have more tests on his neck after the big game. If there's more risk of injury, he may have to retire. But for now, with a comeback kid on one side, and a tough-talking defense on the other, this could be a super bowl for the ages. Ryan smith, ABC news, New York.
This transcript has been automatically generated and may not be 100% accurate.