Klein, who has 28 total touchdowns this season, is a clear front runner for the Heisman Trophy.
Gundy pointed out it's difficult to defend Klein and the Wildcats' offense because there's no way to take away Klein's running ability and said K-State's scheme won't allow you to make them one-dimensional.
OSU travels to Manhattan, Kan., to take on K-State on Saturday at 7 p.m. The game will be televised on ABC (Cox 8).
Here is a look at what else Gundy had to say during his press conference in Stillwater: