MIAMI (AP) -- Tim Tebow rallied the Denver Broncos for two touchdowns in the final 2:44 of the fourth quarter to force overtime, and Matt Prater's 52-yard field goal gave them an improbable 18-15 victory Sunday over the stunned Miami Dolphins.

The Broncos appeared beaten when they trailed 15-0 with 5:23 left and took over at their 20. At that point Tebow was 4 for 14 for 40 yards.

But he threw two TD passes sandwiched around a successful onside kick, and scored a 2-point conversion standing up with 17 seconds left to tie the game.

In overtime, Denver's D.J. Williams sacked Matt Moore to force a fumble and recovered it at the Miami 36. Three plays later Prater hit the game-winner.

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