Tony Gutierrez/Associated Press
Nobody has won more games in Big 12 history as a starting quarterback than Colt McCoy. His 45 victories as the starter from 2006-09 rank second in NCAA history and first in conference history.
That's why McCoy is the top quarterback in Big 12 history. Nobody won at a higher level over four seasons better than McCoy did.
Not only did McCoy win a lot, he was a heck of a passer as well. He is Texas' all-time career leader in touchdown passes (112), passing yards (13,253), completions (1,157) as well as plenty of other records that will almost certainly go unbroken.
After McCoy was injured against Alabama in the 2010 BCS title game, many thought that the injury and the lack of McCoy's leadership is what cost the Longhorns a shot at the national championship.
Since McCoy's departure, the Longhorns have struggled to find consistency at the quarterback position. David Ash hasn't been consistent, and McCoy's younger brother Case didn't pan out. In fact, many point to Texas' struggles to find a quarterback as a big reason for Mack Brown's ouster from the Longhorns.
At the end of the day, McCoy may not have a national title or a Heisman to his name. But he has more wins than anybody else to ever play quarterback in the Big 12, and he was one of the league's best for the better half of a decade.
That earns the top spot on this list.