UNDATED (AP) - The Denver Broncos are atop the AFC West following another fourth-quarter comeback engineered by Tim Tebow. 
     
The Broncos failed to score on their first 11 possessions and trailed 10-0 until Tebow led three straight scoring drives 
and Matt Prater (PRAY'-tur) hit a pair of long field goals to lead a 13-10 overtime win against the Chicago Bears. The comeback began with Tebow's 10-yard scoring pass to Demaryius Thomas with just 2:08 left in regulation. 
     
Tebow also engineered a game-tying scoring drive in the final minute of regulation before Prater hit a 59-yard field goal 
with three seconds left. Prater won it by drilling a 51-yard kick with 8:34 left in OT following a fumble by Marion Barber on the 
Denver 33. Barber also ran out of bounds while the Bears were trying to kill the clock late in the fourth quarter. 
     
Barber finished with 108 rushing yards and a touchdown for the 7-6 Bears, who fell a game behind Atlanta and Detroit in the  battle for the two NFL wild-card berths. 
     
The 8-5 Broncos are one game ahead of Oakland for the AFC West lead. Denver has won six straight and seven of eight since Tebow became the starting quarterback.