Oklahoma's defense flourishes under coordinator Alex Grinch

Oklahoma linebacker Nik Bonitto (11) tackles Kansas State running back Deuce Vaughn (22) during an NCAA college football game Saturday, Oct. 2, 2021 in Manhattan, Kan. (Ian Maule/Tulsa World via AP)

Kansas State running back Deuce Vaughn (22) is tackled by Oklahoma safety Pat Fields (10) during the second half of an NCAA college football game in Manhattan, Kan., Saturday, Oct. 2 2021. (AP Photo/Orlin Wagner)

Kansas State running back Joe Ervin (20) is tackled by Oklahoma defensive back Justin Broiles (25) during the first half of an NCAA college football game in Manhattan, Kan., Saturday, Oct. 2 2021. (AP Photo/Orlin Wagner)

Oklahoma defensive end Reggie Grimes (14) and defensive lineman Isaiah Coe (94) hit Kansas State quarterback Skylar Thompson (7) after a pass during an NCAA college football game Saturday, Oct. 2, 2021 in Manhattan, Kan. (Ian Maule/Tulsa World via AP)