I'm going to start this list off from No. 3-5, considering we know the other two prospects are Robert Griffin III and Andrew Luck.
3. Ryan Tannehill (Texas A&M)
After playing wide receiver in 2008 and 2009, Ryan Tannehill became the starting quarterback during the 2010 season. He completed 65 percent of his passes for 1,638 yards with 13 touchdowns and six interceptions in seven games at quarterback. The background as a wide receiver can be seen in the athletic Tannehill. He is an elusive runner with deceptive speed. Tannehill needs more time to develop as a signal caller. His accuracy and mechanics are definitely a work in progress. For a team looking for a developmental, backup quarterback who could contribute in a Wildcat package, Tannehill could be a good mid-round pick. He is a gamer and should impress coaching staffs in pre-draft meetings.
4. Kirk Cousins (Michigan State)
Cousins has an enough of an arm to be a starting NFL quarterback. He is a good game-manager who could be a good quarterback to install in a play-action-based passing attack with a strong running game. When given time to throw Cousins is very effective. He struggles and makes bad decisions when he gets defensive linemen in his face. Cousins will have to improve that to have a shot at sneaking into the first round. He has good leadership skills. The smart and efficient signal caller is the type of quarterback who should have a solid senior year and is a safe bet to be a second-round draft pick.
5. Case Keenum (Houston)
Keenum set all kinds of NCAA records with a massive senior season. He completed 71 percent of his passes for 5,631 yards with 48 touchdowns and five interceptions. Throughout 2011, Keenum put up staggering numbers but had a disappointing home game loss to Southern Mississippi that cost Houston the Conference USA Championship and an undefeated season. In his bowl against Penn State, he bounced back, throwing for 532 yards and three touchdowns. Keenum looks like a system quarterback who needed to do well at the Senior Bowl to show he can be more than that.