Tebow continues to amaze against Alabama; Fellow QB Davis stumbles

The opportunity is there every week. Some players seize it. Others let it slide away. Here's a look at the players who shone or slipped in Week 15:

Stock up
1. Florida QB Tim Tebow
It takes something special for Tebow to increase his stock at this point, and his performance in the SEC title game fits the description. Consider the scenario: The SEC title and a BCS national championship berth hanging in the balance and the Gators facing an Alabama defense ranked in the top five nationally in four major categories, and dynamic playmaker Percy Harvin out with an injury.

Clearly, this was not just another day at the office for college football's best player. Yet, Tebow seemed unfazed. The junior signal-caller threw for 216 yards and three scores, and also led the team with 57 rushing yards. More impressive than any statistic, though, was Tebow's flat-out refusal to lose. When his team needed him most, Tebow consistently delivered. After much consideration, my vote for this year's Heisman would still go to Texas QB Colt McCoy, but I certainly can't argue with anyone casting a vote for Tebow.

Stock down
1. Ball State QB Nate Davis
It seems unfair to knock Davis considering he was the driving force behind Ball State's undefeated regular season. Still, as one of the premier quarterbacks in the country and a future first-day NFL draft pick, it's his responsibility to shine in his team's biggest games. That was far from the case in the MAC championship game against Buffalo.

The junior had a forgettable night, playing a role in each of his team's four fumbles and also throwing an interception. That's five giveaways in one game. While it's tough to fault him for the effort, Davis' fumble along the goal line that was returned 92 yards for a go-ahead score late in the third quarter proved to be a backbreaker.

Scouts Inc. watches games, breaks down film and studies football from all angles for ESPN Insider. Listen to Todd McShay break down the biggest games and give you all the scores on "College GameDay" on ESPN Radio every Saturday from noon to 7 p.m. ET. He also is a frequent contributor to ESPNU.