Brett Venables' Oklahoma defense entered Saturday as the No. 1 scoring unit in the SEC and one of the top in America. In Tuscaloosa on Saturday afternoon, it was the catalyst behind No. 11 Oklahoma's upset win over No. 4 Alabama.

The Oklahoma Sooners defeated the Alabama Crimson Tide 23-21 Saturday at Bryant-Denny Stadium in a major resume-booster for the College Football Playoff.

Kip Lewis had seven tackles, including two sacks, and No. 11 Oklahoma stunned fourth-ranked Alabama 23-21 on Saturday to send shock waves through the Southeastern Conference.The Sooners (7-2, 4-2 SEC,

Off to a 3-0 start, Colorado will look to continue trending in the right direction when it welcomes Alabama State on Monday night in Boulder, Colo.

Alabama football offensive coordinator Ryan Grubb's innovative play calling against Oklahoma's top-ranked defense will make for fine theater Saturday.

Alabama’s defense is solid, allowing only 35% shooting from downtown, which should challenge a Purdue group heavily reliant on the triple. Purdue’s defensive efficiency is still Top 50 at KenPom, and the return of Trey Kaufman-Ren should help stymie a Crimson Tide group getting 53.6% of its production from inside the arc.

No. 4 Alabama hosts No. 11 Oklahoma in a marquee battle at Bryant-Denny Stadium on Satiurday. The Crimson Tide have won eight straight games heading into the weekend, including a 20-9 victory over LSU last week. The Sooners, however, are perhaps the best defense Alabama will play all season.

The Alabama Crimson Tide and Oklahoma Sooners square off in what will be a pivotal game for both programs. Alabama is on a heater following that Week 1 loss, aiming to cement its standing within the College Football Playoff bracket, if not improve its positioning.