Defense may holds keys to Oklahoma's title hopes

Oklahoma running back Kennedy Brooks warms up with teammates during an NCAA college football practice in Norman, Okla., Monday, Aug. 5, 2019. (AP Photo/Sue Ogrocki)

FILE - In this Monday, Aug. 5, 2019, file photo, Oklahoma quarterbacks Jalen Hurts, left, and Tanner Mordecai, right, throw during NCAA college football practice in Norman, Okla. Hurts is competing with Mordecai, a redshirt freshman, and Spencer Rattler, a true freshman, to become starting quarterback. (AP Photo/Sue Ogrocki, File)

Oklahoma linebacker Kenneth Murray warms up during an NCAA college football practice in Norman, Okla., Monday, Aug. 5, 2019. (AP Photo/Sue Ogrocki)

Oklahoma wide receiver CeeDee Lamb reaches for a pass during an NCAA college football practice in Norman, Okla., Monday, Aug. 5, 2019. (AP Photo/Sue Ogrocki)

Oklahoma wide receiver CeeDee Lamb is pictured during an NCAA college football practice in Norman, Okla., Monday, Aug. 5, 2019. (AP Photo/Sue Ogrocki)

In this Aug. 2, 2019, photo, Oklahoma defensive coordinator Alex Grinch answers a question during the NCAA college football team's media day in Norman, Okla. Grinch, the man who previously rebuilt Washington State's defense and more recently was co-defensive coordinator at Ohio State, is bringing his aggressive approach to Oklahoma. (AP Photo/Sue Ogrocki)

In this Friday, Aug. 2, 2019, photo, Oklahoma defensive coordinator Alex Grinch answers a question during the NCAA college football team's media day in Norman, Okla. Grinch, the man who previously rebuilt Washington State's defense and more recently was co-defensive coordinator at Ohio State, is bringing his aggressive approach to Oklahoma. (AP Photo/Sue Ogrocki)

FILE - In this Monday, Aug. 5, 2019, file photo, Oklahoma quarterback Jalen Hurts throws during an NCAA college football practice in Norman, Okla. Hurts is competing with Tanner Mordecai, a redshirt freshman, and Spencer Rattler, a true freshman, to become starting quarterback.(AP Photo/Sue Ogrocki, File)