This summer, ESPN.com is taking a closer look at each scholarship player on the Oklahoma Sooners' roster in our Crimson Countdown series. Each day, we analyze each player’s impact on the program since arriving on campus, his potential impact this fall, and his long-term projection. Starting with No. 1 Dominique Alexander, the series followed the roster numerically and concludes today with No. 98 Chuka Ndulue.

No. 98 Chuka Ndulue, defensive tackle, 6-foot-3, 289 pounds, senior

Impact thus far: Arguably the most overshadowed contributor on the roster. He’s displayed terrific versatility and production during his time as a Sooner. He’s started 19 of 32 career games with 91 tackles including 12 tackles for loss and 8.5 sacks. In 2013, he brought a veteran presence to the defensive line with nine starts in 12 games played and 42 total tackles.

Impact in 2014: Ndulue should be a core contributor for the Sooners’ defensive line for the third straight season. His versatility and experience are key assets on a defensive front that could become the Big 12’s best unit.

Long-term upside: Much like 2013, he’s likely to be outshined by Eric Striker, Geneo Grissom, Charles Tapper and the rest of OU’s attacking pass rush, thus missing out on postseason honors, but he’s a key part of the Sooners' defense.

Evaluation grade for Ndulue: A. Anytime a signee becomes a three-year starter, he’s a pretty good evaluation. Brought in as a defensive end, Ndulue should the willingness and ability to move around the defensive line to help OU get its top performers on the field.

Development grade for Ndulue: A. Thanks to a redshirt season in 2010, Ndulue is around to provide a productive, experienced player in the middle of OU’s defensive interior.