The Kansas State quarterback received 12 of 15 first-place votes and has 71 overall points, 19 points more than No. 2, Texas A&M quarterback Johnny Manziel.
Manziel received two first-place votes. Notre Dame linebacker Manti Te'o received one.
Klein was the only Big 12 player to appear on a ballot, but he got votes on all 15 ballots. He grabbed two second-place votes and one third-place vote.
Manziel had eight second-place votes, three third-place votes and a fifth-place vote. One voter left him off the ballot.