O'Connor, a former walkon who earned a scholarship prior to the 2014 campaign, saw action in 22 career contests. He plans to finish his degree and focus on the social entrepreneurship he founded: Wild Child Company.
"I'm very proud of Devin for earning a scholarship and helping our football team," said Doeren. "He has proven himself and earned the respect of everybody in our program. There are great days ahead of him and I'm looking forward to watching him attack and achieve his goals professionally."
Buckley has played in 34 career games for the Wolfpack, mainly seeing action on special teams.
"I enjoyed the opportunity to coach Tim personally last year when I worked with the nickels," Doeren continued. "He was a productive member of our special teams units and our defense. I respect his wishes to focus on his life after football and wish him the very best in that pursuit."