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Derek Gee, Associated Press
Denver Broncos quarterback Tim Tebow throws a touchdown pass against the Buffalo Bills during the second half of an NFL football game in Orchard Park, N.Y., Saturday, Dec. 24, 2011.

ENGLEWOOD, Colo. — He's revived a foundering franchise with last-minute magic and put the buzz back in the Broncos. Tim Tebow's next challenge is rebounding from the worst game of his career.

Tebow threw four interceptions in a 40-14 loss at Buffalo on Christmas Eve, two of which were returned for touchdowns in a 19-second span.

If Tebow was shaken by the first four-interception game of his life, he isn't showing it, insisting "my confidence is just fine."

That faith will come in handy Sunday when Tebow tries to beat the guy he couldn't beat out in training camp — Kyle Orton, who brings the Kansas City Chiefs to Denver with a shot at spoiling the playoff hopes of a team that shunted him aside.