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Brody Schmidt/Associated Press

Mobile quarterbacks bring the excitement to college football, but the ability to throw the ball accurately to every area of the field will always be the most coveted trait in a signal-caller.

We're looking at the best pure passers who are returning to the college ranks in 2017.

To be clear, this isn't an overall quarterback ranking. Otherwise, talented players like Jalen Hurts, Trace McSorley, Quinton Flowers, J.T. Barrett and Jake Browning would also be spotlighted.

Except for not including prospects who signed in 2017, age had no effect on the rankings. Sample size mattered, but each quarterback has been a starter for at least a majority of one season.