NORMAN, Okla. -- Standing on the letter "O" in Baylor's end zone, Bryce Petty took the snap and play faked to running back Shock Linwood. Just 2.6 seconds later, Oklahoma linebacker Dominique Alexander engulfed Petty to give the Sooners' their first points of the game on a safety and record the first sack of his collegiate career.
The true freshman has come a long way since preseason camp opened in August.
The big play was a glimpse of the upside Alexander possesses, as he accelerated around the corner, unblocked, to sack Petty in the biggest game of Alexander's career thus far. The Tulsa, Okla., native has grown immensely as a player since his first start against Texas in the Red River Rivalry.
"I'm playing faster since my first start; I'm seeing things," Alexander said. "My coaches said my vision has gotten a lot better, seeing the whole play. I can see things a lot better with the more games I've played. I have a lot more confidence since my first game."
Alexander has been one of the most productive players on the Sooners' defense since Corey Nelson was injured against TCU. He has stepped into Nelson's role and recorded double-digit tackles in two of the four games, including an 11-tackle effort against Baylor last Thursday. He ranks third on the squad with 51 tackles.
"For a guy who has not been in the system at all until this summer he has shown great maturity on and off the field," defensive coordinator Mike Stoops said. "He's a guy we can lean on and will be a strong player in this system."
Alexander has been a shining light during some cloudy days for the Sooners, who have lost two of their last four contests. And he isn't the only reason for hope for the future on the defensive side of the football.
OU entered the season with an inexperienced defensive unit, yet thanks in part to strong contributions from young, inexperienced players like Alexander, the defense has emerged as the strongest unit on the team. Alexander, linebacker Eric Striker, cornerback Zack Sanchez, defensive tackle Jordan Wade and defensive end Charles Tapper are among several freshmen and sophomores who have shown they can be the foundation of the Sooners defense in the future.
"All those guys show signs of building for the future," Stoops said. "I'm excited about all of our young players."
Striker is the Sooners' top pass rusher and has been terrorizing quarterbacks throughout the season. He has proven very difficult to block with one blocker in passing situations, and the sophomore is tied for the team lead with seven quarterback hurries to go with his 2.5 sacks.
Tapper has looked like one of the best defenders on the team at various times during his sophomore season. His strength, athleticism, quickness and speed could make him the nest great defensive end in Norman. He leads the team with 4.5 sacks and seven tackles for loss along with his seven hurries to tie Striker.
Sanchez has had ups-and-downs during his redshirt freshman campaign but has displayed the competitive nature that many stellar cornerbacks possess. He went from afterthought to starting every game of his first season on the field and should be a key contributor for years to come. He has been picked on throughout the season and has responded with a team-high 10 pass breakups.
Wade has stepped in for Jordan Phillips, who was lost for the season with a back injury. The redshirt freshman hasn't been the anchor or disruptive force that Phillips was becoming, but he has shown signs he could be a quality defensive tackle for the Sooners during his career. He has blocked two kicks and recorded one sack this season.
Several other youngsters, including cornerback Stanvon Taylor, defensive end Matt Dimon and linebacker Jordan Evans have had their moments, as well, during their true freshmen seasons and look like they could become the foundation of what the Sooners hope can be a championship defense in the future.
"I couldn't be more excited about what we are doing with a lot of these guys," Stoops said. "They show a strong desire to want to be good. They show a very competitive element. There's a lot to build on."