Spencer joined the staff as defensive line coach in 2008 and was elevated to defensive coordinator in 2013.
Oklahoma State football coach Mike Gundy announced today that defensive coordinator Glenn Spencer will not be retained.
In the release, Gundy said he was "appreciative for the 10 years of loyal service that Glenn Spencer gave Oklahoma State". In 2013, he was promoted to defensive coordinator and that season was nominated for the Broyles Award, given to the nation's top assistant coach.
For the 2017 season, the Cowboys ranked 79 in the country in total defense, allowing 409 yards a game.
Oklahoma State ranked 85th in scoring defense this past year, allowing 29.4 points per game.
Glenn Spencer is out at Oklahoma State. While the team's pace and the Big 12 competition doesn't help, allowing more than 40 points in four games past year is reason enough to reevaluate the staff.
The Cowboys finished the year 10-3 with a win in the Camping World Bowl, their third straight 10-win season and fourth in the last five years.