Stewart, Barnett, Gilbert lead Orange; Lowe and Lewis headline the White.
Safeties coach Tim Duffie breaks down his position group.
Comments from Mike Gundy and several members of the team.
Gundy talks about new defensive philosophy, what he's learned about the team this spring.
Transcript from Oklahoma State football's Wednesday availability session.
No. 2 Oklahoma State vs. Texas Tech - AP Photo Gallery
Entered the season as a potential contributor and ended it as an important defender with his ability to run, tackle and defend the pass.
2012 (Sophomore): Had three tackles in the opener ... Was sidelined the next four games due to injury ... Had season-high, five-tackle efforts against Texas Tech and West Virginia, and four stops against TCU and Purdue ... Also forced a fumble against the Boilermakers ... Despite being slowed by injury, his seven tackles for loss tied for fourth on the team and he tied for the team lead with two interceptions ... Had quarterback sacks against Savannah State and West Virginia ... His TCU tackle total included one behind the line of scrimmage ... Had a pair of TFLs and a fumble recovery against Texas Tech ... Intercepted a pass against Savannah State, and his interception and 46-yard return against Oklahoma set up a Cowboy touchdown ... Had two tackles at Baylor.
2011 (Freshman): Played in nine games, primarily on special teams ... Finished the season with 11 tackles ... Had three stops against Kansas and two against Texas Tech, Arizona and Louisiana.
High School: A national recruit who Scout ranked No. 19 at his position and No. 39 overall in Texas ... A member of the Texas Super Team as selected by Texas Football ... Ranked No. 60 in Texas by SuperPrep ... A member of the Austin American Statesman Fab 55 ... An all-county and all-district selection ... Dallas Morning News top 100 pick ... Had 58 tackles and two interceptions as a senior and 72 stops as a junior ... Schools lining up for his signature were numerous and included Arkansas, Oklahoma, Nebraska, Notre Dame, TCU, Texas A&M and Utah.
Personal: Born Sept. 24, 1991, in Dallas ... Son of Antonette and Carlos Harwell ... Plans to pursue law enforcement as a career ... Has a brother and a sister.