Oklahoma State football coach Mike Gundy announced Thursday that defensive coordinator Glenn Spencer will not be retained for next season, per George Schroeder of USA Today.
"I'm very appreciative for the 10 years of loyal service that Glenn Spencer gave to Oklahoma State," Gundy said.
Spencer has been with the program since 2008 but has served as the team's defensive coordinator since 2013.
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. The squad finished 14th in the final Associated Press poll.