Thomas The candidates for the 2013 Heisman Trophy will be ever-changing all throughout the college football season until the finalists are announced and headed to New York.

One of the favorites for the Heisman is last year's winner Texas A&M quarterback Johnny Manziel, who's trying to become the second collegian (Ohio State running back Archie Griffin in 1974-75) to win the trophy in consecutive seasons.

But, the odds are against him. Keep in mind, Manziel wasn't on anyone's radar to win the trophy last fall either. 

Here are 10 players flying under the radar for the 2013 Heisman Trophy:

1) RB De'Anthony Thomas, Oregon

No arguing that Oregon Ducks De'Anthony Thomas is one of the most talented running backs in the country, but his team's offensive style will hurt him in the Heisman voting this year.

The Ducks' scheme is to distribute the football to as many skill players as possible, as you will see Thomas lineup in multiple positions throughout a game. One series, you might see him in the backfield on the first play, then lining up in the slot position and finally outside as a wide receiver. Thomas' game-breaking speed will allow him to put up impressive offensive numbers, but will it be enough for Heisman consideration is another story. 

2) QB Teddy Bridgewater, Louisville

How realistic is it to think Louisville Cardinals quarterback Teddy Bridgewater will win the Heisman Trophy this year? Well, his chances depend heavily on the improvements made to his overall game this offseason. To put himself into contention, Bridgewater will need to lead Louisville to an undefeated season, with at least one quality win over a nationally-ranked school. 

3) WR Marqise Lee, USC

On pure talent alone, USC wide receiver Marqise Lee should be invited to the Heisman Trophy presentation in New York this December, but his receiving numbers should take a sizable hit due to not having a quality supporting cast around him this season. Lee should see his fair share of double-teams, but to gain Heisman votes, he must continue to show his athleticism and explosiveness off a catch from a precision pass route. 

4) RB T.J. Yeldon, Alabama

If you're looking for another sophomore to win the Heisman this season, then you won't have to look any further than on the campus of Alabama. Running back T.J. Yeldon of the Crimson Tide has all of the required skills needed to at least be in the conversation this December.

In a backup role last season, he rushed for 1,000 yards and scored 10 touchdowns in limited playing time. Exit Eddie Lacy and enter Yeldon into the starting lineup, as a new star is born in the SEC.

5) QB Taylor Martinez, Nebraska

Nebraska quarterback Taylor Martinez bursted onto the college football scene by scoring 12 touchdowns in his first five starts. His passing efficiency has always been in questioned, but Martinez may have turned the corner by completing 62 percent of his passes last season. A potential showdown against leading Heisman candidate quarterback Braxton Miller of Ohio State in a key Big Ten matchup could determine his fate in the race. 

Seastrunk 6) RB Lache Seastrunk, Baylor

The collegiate career of Baylor Bears running back Lache Seastrunk has been quite bumpy, as he left the campus of Oregon before even playing one down for the Ducks.

Seastrunk has found a home in Waco, and hopes this is a season to remember. In the open field, he makes tacklers miss, as he patiently waits for his blocking to develop, then uses his quick feet to cut to the outside and gain big yardage.

The question that still remains is if this potent rushing attack can showcase Seastrunk enough to make him a viable Heisman candidate. 

7) QB Devin Gardner, Michigan

If you thought Michigan's chances of having another Heisman Trophy winner walking around campus ended when Denard Robinson left school, then you were wrong. Wolverines head coach Brady Hoke has handed over the keys to the offense to another elite quarterback, and his name is Devin Gardner.

He's one of the few five-star recruited quarterbacks starting in college football today, as Gardner can make plays with either his arm or legs.

8) NG Louis Nix, Notre Dame

All eyes will be on Notre Dame Stephen Tuitt, who's one of the best defensive ends in the country. But, the heart and soul of the Fighting Irish defense is Louis Nix, the lone star of the BCS Championship game debacle. The Heisman voters will love how his motor continually runs throughout a game, as Nix is the prototypical defensive tackle, who can plug the middle of the line of scrimmage. 

9) RB Ka'Deem Casey, Arizona

Last season, Arizona Wildcats running back Ka'Deem Casey was a virtual unknown to the majority of the country, eventhough he lead the nation ( 1,929 yards with 24 touchdowns) in rushing. The talented back has excelled in head coach Rich Rodriquez's spread offense, and this should hold true again this season. His reckless off-the-field behavior will discourage some voters to choose Casey, but he has a full year to show change in his character.

10) QB Brett Hundley, UCLA

The downfall of the Rick Neuheisel era at UCLA was the inability to recruit a starting quarterback. Well, that notion is false, as UCLA finally has a signal-caller and he could become a Heisman Trophy candidate by season's end.

Redshirt sophomore Brett Hundley threw for 4,100 yards and lead the surging Bruins to an unexplainable appearance in the Pac-12 title game. Whether he likes it or not, Hundley is in the spotlight this season. Former UCLA running back Johnathan Franklin is in the NFL, so Hundley is now the focal point of the offense.