Skyler Cassity’s return to Stillwater has given Oklahoma State more than a homecoming story. Through two games, it has given the Cowboys a defense that has been better than anyone expected.
That mattered most in the upset of Oregon, when Oklahoma State piled up 554 yards and still could point to the more striking number: the 281 yards Cassity’s defense gave up. Sean Brophy didn’t hide how rare that felt.
“I don’t think you can give enough credit to Skyler or our entire defensive staff for their effort on Saturday,” Brophy said. “I don’t know if I could even imagine holding Oregon to under 300 yards offense.”
Cassity’s path back to Oklahoma State runs through a familiar coaching connection. He first met Eric Morris in 2017 on Kliff Kingsbury’s staff at Texas Tech, when Morris was an offensive coordinator and headed toward his first head-coaching job at Incarnate Word. Cassity was a defensive graduate assistant then, still years away from becoming a defensive coordinator at Abilene Christian.
Morris saw enough early to know Cassity was going to rise.
“I always love watching young coaches work,” said Morris, who was barely 30 at the time, “and it usually doesn’t take me long to figure out that they’re going to be good.”
Morris’ read held up. After Cassity built defenses at Abilene Christian and Sam Houston State, Morris brought him to North Texas to run the defense. A year later, and nearly a decade after their first stop together, Morris is now the head coach at Oklahoma State and Cassity is beside him again as the Cowboys’ defensive coordinator.
For Cassity, the move comes with layers. He lived in Stillwater from ages 5 to 7 while his father, Mike, held the same job he now has.
His brother, Braden, played for the Cowboys from 2019-23. So when Cassity talked after practice on Tuesday, the setting felt personal.
“It’s funny, I’ve spent so much time here throughout the years,” Cassity said Tuesday after practice. “I’ve been on the opposing sideline, unfortunately, so it was nice to be on the home sideline and have the crowd cheering with you on third down as opposed to against you.”
The Cowboys’ offense has gotten plenty of attention for the work Morris and Brophy have done identifying Drew Mestemaker and uncovering Caleb Hawkins and Wyatt Young. But the defense has been the steadier force so far.
That’s a sharp change from recent seasons. Oklahoma State finished 116th in total defense in 2025 and 133rd in 2024.
This year, it sits 67th. That number is hardly elite, but it looks a lot better in context, especially after the way the unit handled Oregon.
Cassity said the standard inside the program is high.
“I think we just have a high standard for ourselves,” Cassity said. “Kind of like Coach Morris does, it’s not about taking the four or five-star player, we’re looking for people that fit our system, fit who we are and the way we believe and the standard that we play on defense.”
One of the biggest reasons the defense has started well is senior linebacker Ethan Wesloski, a transfer from North Texas. He leads the team with 16 tackles and was named Big 12 Defensive Player of the Week.
The Cowboys have also been difficult to move on third down. Tulsa and Oregon combined to convert only 24% of their third-down chances against Oklahoma State.
Brophy said Cassity’s scheme gives offenses a lot to think about.
“He provides a ton of different issues schematically,” Brophy said. “...
He also provides the illusion of complexity in a way that offenses like to do as well. He gets his guys to play fast, he gets them to play hard.
The guys believe in Skyler, they love Skyler.”
The players echo that. Defensive end Malik Charles described Cassity as approachable, detailed and demanding in the right moments.
“He’s a cool, down-to-earth guy,” Charles said. “His scheme is easy to get.
He’s hilarious, but he knows when it’s time to work. He’s gonna give you your props when you do something good, but he’s also gonna get on your butt if something’s bad and we need to fix it.
I love playing for him.”
Charles said he was recently in Cassity’s office, where football wasn’t the only topic.
“We were just chatting it up about different kinds of music we like,” Charles said. “When you see him, you don’t always talk about football, and that’s what I like.”
Cassity is 32, and his players are quick to notice that he is close enough in age to connect without losing authority.
“He tries to act young sometimes,” Charles said. “He’s not.”
Still, the rise has been quick from those Texas Tech days. And in Stillwater, Cassity’s defense has already given Oklahoma State something it badly needed: proof that the ceiling might be higher than expected.
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